jscolor.js

/**
 * jscolor, JavaScript Color Picker
 *
 * @version 1.4.0
 * @license GNU Lesser General Public License, http://www.gnu.org/copyleft/lesser.html
 * @author  Jan Odvarko, http://odvarko.cz
 * @created 2008-06-15
 * @updated 2012-07-06
 * @link    http://jscolor.com
 */


var jscolor = {


  dir : '', // location of jscolor directory (leave empty to autodetect)
  bindClass : 'color', // class name
  binding : true, // automatic binding via <input class="...">
  preloading : true, // use image preloading?


  install : function() {
    jscolor.addEvent(window, 'load', jscolor.init);
  },


  init : function() {
    if(jscolor.binding) {
      jscolor.bind();
    }
    if(jscolor.preloading) {
      jscolor.preload();
    }
  },


  getDir : function() {
    if(!jscolor.dir) {
      var detected = jscolor.detectDir();
      jscolor.dir = detected!==false ? detected : 'jscolor/';
    }
    return jscolor.dir;
  },


  detectDir : function() {
    var base = location.href;

    var e = document.getElementsByTagName('base');
    for(var i=0; i<e.length; i+=1) {
      if(e[i].href) { base = e[i].href; }
    }

    var e = document.getElementsByTagName('script');
    for(var i=0; i<e.length; i+=1) {
      if(e[i].src && /(^|\/)jscolor\.js([?#].*)?$/i.test(e[i].src)) {
        var src = new jscolor.URI(e[i].src);
        var srcAbs = src.toAbsolute(base);
        srcAbs.path = srcAbs.path.replace(/[^\/]+$/, ''); // remove filename
        srcAbs.query = null;
        srcAbs.fragment = null;
        return srcAbs.toString();
      }
    }
    return false;
  },


  bind : function() {
    var matchClass = new RegExp('(^|\\s)('+jscolor.bindClass+')\\s*(\\{[^}]*\\})?', 'i');
    var e = document.getElementsByTagName('input');
    for(var i=0; i<e.length; i+=1) {
      var m;
      if(!e[i].color && e[i].className && (m = e[i].className.match(matchClass))) {
        var prop = {};
        if(m[3]) {
          try {
            prop = (new Function ('return (' + m[3] + ')'))();
          } catch(eInvalidProp) {}
        }
        e[i].color = new jscolor.color(e[i], prop);
      }
    }
  },


  preload : function() {
    for(var fn in jscolor.imgRequire) {
      if(jscolor.imgRequire.hasOwnProperty(fn)) {
        jscolor.loadImage(fn);
      }
    }
  },


  images : {
    pad : [ 181, 101 ],
    sld : [ 16, 101 ],
    cross : [ 15, 15 ],
    arrow : [ 7, 11 ]
  },


  imgRequire : {},
  imgLoaded : {},


  requireImage : function(filename) {
    jscolor.imgRequire[filename] = true;
  },


  loadImage : function(filename) {
    if(!jscolor.imgLoaded[filename]) {
      jscolor.imgLoaded[filename] = new Image();
      jscolor.imgLoaded[filename].src = jscolor.getDir()+filename;
    }
  },


  fetchElement : function(mixed) {
    return typeof mixed === 'string' ? document.getElementById(mixed) : mixed;
  },


  addEvent : function(el, evnt, func) {
    if(el.addEventListener) {
      el.addEventListener(evnt, func, false);
    } else if(el.attachEvent) {
      el.attachEvent('on'+evnt, func);
    }
  },


  fireEvent : function(el, evnt) {
    if(!el) {
      return;
    }
    if(document.createEvent) {
      var ev = document.createEvent('HTMLEvents');
      ev.initEvent(evnt, true, true);
      el.dispatchEvent(ev);
    } else if(document.createEventObject) {
      var ev = document.createEventObject();
      el.fireEvent('on'+evnt, ev);
    } else if(el['on'+evnt]) { // alternatively use the traditional event model (IE5)
      el['on'+evnt]();
    }
  },


  getElementPos : function(e) {
    var e1=e, e2=e;
    var x=0, y=0;
    if(e1.offsetParent) {
      do {
        x += e1.offsetLeft;
        y += e1.offsetTop;
      } while(e1 = e1.offsetParent);
    }
    while((e2 = e2.parentNode) && e2.nodeName.toUpperCase() !== 'BODY') {
      x -= e2.scrollLeft;
      y -= e2.scrollTop;
    }
    return [x, y];
  },


  getElementSize : function(e) {
    return [e.offsetWidth, e.offsetHeight];
  },


  getRelMousePos : function(e) {
    var x = 0, y = 0;
    if (!e) { e = window.event; }
    if (typeof e.offsetX === 'number') {
      x = e.offsetX;
      y = e.offsetY;
    } else if (typeof e.layerX === 'number') {
      x = e.layerX;
      y = e.layerY;
    }
    return { x: x, y: y };
  },


  getViewPos : function() {
    if(typeof window.pageYOffset === 'number') {
      return [window.pageXOffset, window.pageYOffset];
    } else if(document.body && (document.body.scrollLeft || document.body.scrollTop)) {
      return [document.body.scrollLeft, document.body.scrollTop];
    } else if(document.documentElement && (document.documentElement.scrollLeft || document.documentElement.scrollTop)) {
      return [document.documentElement.scrollLeft, document.documentElement.scrollTop];
    } else {
      return [0, 0];
    }
  },


  getViewSize : function() {
    if(typeof window.innerWidth === 'number') {
      return [window.innerWidth, window.innerHeight];
    } else if(document.body && (document.body.clientWidth || document.body.clientHeight)) {
      return [document.body.clientWidth, document.body.clientHeight];
    } else if(document.documentElement && (document.documentElement.clientWidth || document.documentElement.clientHeight)) {
      return [document.documentElement.clientWidth, document.documentElement.clientHeight];
    } else {
      return [0, 0];
    }
  },


  URI : function(uri) { // See RFC3986

    this.scheme = null;
    this.authority = null;
    this.path = '';
    this.query = null;
    this.fragment = null;

    this.parse = function(uri) {
      var m = uri.match(/^(([A-Za-z][0-9A-Za-z+.-]*)(:))?((\/\/)([^\/?#]*))?([^?#]*)((\?)([^#]*))?((#)(.*))?/);
      this.scheme = m[3] ? m[2] : null;
      this.authority = m[5] ? m[6] : null;
      this.path = m[7];
      this.query = m[9] ? m[10] : null;
      this.fragment = m[12] ? m[13] : null;
      return this;
    };

    this.toString = function() {
      var result = '';
      if(this.scheme !== null) { result = result + this.scheme + ':'; }
      if(this.authority !== null) { result = result + '//' + this.authority; }
      if(this.path !== null) { result = result + this.path; }
      if(this.query !== null) { result = result + '?' + this.query; }
      if(this.fragment !== null) { result = result + '#' + this.fragment; }
      return result;
    };

    this.toAbsolute = function(base) {
      var base = new jscolor.URI(base);
      var r = this;
      var t = new jscolor.URI;

      if(base.scheme === null) { return false; }

      if(r.scheme !== null && r.scheme.toLowerCase() === base.scheme.toLowerCase()) {
        r.scheme = null;
      }

      if(r.scheme !== null) {
        t.scheme = r.scheme;
        t.authority = r.authority;
        t.path = removeDotSegments(r.path);
        t.query = r.query;
      } else {
        if(r.authority !== null) {
          t.authority = r.authority;
          t.path = removeDotSegments(r.path);
          t.query = r.query;
        } else {
          if(r.path === '') {
            t.path = base.path;
            if(r.query !== null) {
              t.query = r.query;
            } else {
              t.query = base.query;
            }
          } else {
            if(r.path.substr(0,1) === '/') {
              t.path = removeDotSegments(r.path);
            } else {
              if(base.authority !== null && base.path === '') {
                t.path = '/'+r.path;
              } else {
                t.path = base.path.replace(/[^\/]+$/,'')+r.path;
              }
              t.path = removeDotSegments(t.path);
            }
            t.query = r.query;
          }
          t.authority = base.authority;
        }
        t.scheme = base.scheme;
      }
      t.fragment = r.fragment;

      return t;
    };

    function removeDotSegments(path) {
      var out = '';
      while(path) {
        if(path.substr(0,3)==='../' || path.substr(0,2)==='./') {
          path = path.replace(/^\.+/,'').substr(1);
        } else if(path.substr(0,3)==='/./' || path==='/.') {
          path = '/'+path.substr(3);
        } else if(path.substr(0,4)==='/../' || path==='/..') {
          path = '/'+path.substr(4);
          out = out.replace(/\/?[^\/]*$/, '');
        } else if(path==='.' || path==='..') {
          path = '';
        } else {
          var rm = path.match(/^\/?[^\/]*/)[0];
          path = path.substr(rm.length);
          out = out + rm;
        }
      }
      return out;
    }

    if(uri) {
      this.parse(uri);
    }

  },


  /*
   * Usage example:
   * var myColor = new jscolor.color(myInputElement)
   */

  color : function(target, prop) {


    this.required = true; // refuse empty values?
    this.adjust = true; // adjust value to uniform notation?
    this.hash = false; // prefix color with # symbol?
    this.caps = true; // uppercase?
    this.slider = true; // show the value/saturation slider?
    this.valueElement = target; // value holder
    this.styleElement = target; // where to reflect current color
    this.onImmediateChange = null; // onchange callback (can be either string or function)
    this.hsv = [0, 0, 1]; // read-only  0-6, 0-1, 0-1
    this.rgb = [1, 1, 1]; // read-only  0-1, 0-1, 0-1
    this.minH = 0; // read-only  0-6
    this.maxH = 6; // read-only  0-6
    this.minS = 0; // read-only  0-1
    this.maxS = 1; // read-only  0-1
    this.minV = 0; // read-only  0-1
    this.maxV = 1; // read-only  0-1

    this.pickerOnfocus = true; // display picker on focus?
    this.pickerMode = 'HSV'; // HSV | HVS
    this.pickerPosition = 'bottom'; // left | right | top | bottom
    this.pickerSmartPosition = true; // automatically adjust picker position when necessary
    this.pickerButtonHeight = 20; // px
    this.pickerClosable = false;
    this.pickerCloseText = 'Close';
    this.pickerButtonColor = 'ButtonText'; // px
    this.pickerFace = 10; // px
    this.pickerFaceColor = 'ThreeDFace'; // CSS color
    this.pickerBorder = 1; // px
    this.pickerBorderColor = 'ThreeDHighlight ThreeDShadow ThreeDShadow ThreeDHighlight'; // CSS color
    this.pickerInset = 1; // px
    this.pickerInsetColor = 'ThreeDShadow ThreeDHighlight ThreeDHighlight ThreeDShadow'; // CSS color
    this.pickerZIndex = 10000;


    for(var p in prop) {
      if(prop.hasOwnProperty(p)) {
        this[p] = prop[p];
      }
    }


    this.hidePicker = function() {
      if(isPickerOwner()) {
        removePicker();
      }
    };


    this.showPicker = function() {
      if(!isPickerOwner()) {
        var tp = jscolor.getElementPos(target); // target pos
        var ts = jscolor.getElementSize(target); // target size
        var vp = jscolor.getViewPos(); // view pos
        var vs = jscolor.getViewSize(); // view size
        var ps = getPickerDims(this); // picker size
        var a, b, c;
        switch(this.pickerPosition.toLowerCase()) {
          case 'left': a=1; b=0; c=-1; break;
          case 'right':a=1; b=0; c=1; break;
          case 'top':  a=0; b=1; c=-1; break;
          default:     a=0; b=1; c=1; break;
        }
        var l = (ts[b]+ps[b])/2;

        // picker pos
        if (!this.pickerSmartPosition) {
          var pp = [
            tp[a],
            tp[b]+ts[b]-l+l*c
          ];
        } else {
          var pp = [
            -vp[a]+tp[a]+ps[a] > vs[a] ?
              (-vp[a]+tp[a]+ts[a]/2 > vs[a]/2 && tp[a]+ts[a]-ps[a] >= 0 ? tp[a]+ts[a]-ps[a] : tp[a]) :
              tp[a],
            -vp[b]+tp[b]+ts[b]+ps[b]-l+l*c > vs[b] ?
              (-vp[b]+tp[b]+ts[b]/2 > vs[b]/2 && tp[b]+ts[b]-l-l*c >= 0 ? tp[b]+ts[b]-l-l*c : tp[b]+ts[b]-l+l*c) :
              (tp[b]+ts[b]-l+l*c >= 0 ? tp[b]+ts[b]-l+l*c : tp[b]+ts[b]-l-l*c)
          ];
        }
        drawPicker(pp[a], pp[b]);
      }
    };


    this.importColor = function() {
      if(!valueElement) {
        this.exportColor();
      } else {
        if(!this.adjust) {
          if(!this.fromString(valueElement.value, leaveValue)) {
            styleElement.style.backgroundImage = styleElement.jscStyle.backgroundImage;
            styleElement.style.backgroundColor = styleElement.jscStyle.backgroundColor;
            styleElement.style.color = styleElement.jscStyle.color;
            this.exportColor(leaveValue | leaveStyle);
          }
        } else if(!this.required && /^\s*$/.test(valueElement.value)) {
          valueElement.value = '';
          styleElement.style.backgroundImage = styleElement.jscStyle.backgroundImage;
          styleElement.style.backgroundColor = styleElement.jscStyle.backgroundColor;
          styleElement.style.color = styleElement.jscStyle.color;
          this.exportColor(leaveValue | leaveStyle);

        } else if(this.fromString(valueElement.value)) {
          // OK
        } else {
          this.exportColor();
        }
      }
    };


    this.exportColor = function(flags) {
      if(!(flags & leaveValue) && valueElement) {
        var value = this.toString();
        if(this.caps) { value = value.toUpperCase(); }
        if(this.hash) { value = '#'+value; }
        valueElement.value = value;
      }
      if(!(flags & leaveStyle) && styleElement) {
        styleElement.style.backgroundImage = "none";
        styleElement.style.backgroundColor =
          '#'+this.toString();
        styleElement.style.color =
          0.213 * this.rgb[0] +
          0.715 * this.rgb[1] +
          0.072 * this.rgb[2]
          < 0.5 ? '#FFF' : '#000';
      }
      if(!(flags & leavePad) && isPickerOwner()) {
        redrawPad();
      }
      if(!(flags & leaveSld) && isPickerOwner()) {
        redrawSld();
      }
    };


    this.fromHSV = function(h, s, v, flags) { // null = don't change
      if(h !== null) { h = Math.max(0.0, this.minH, Math.min(6.0, this.maxH, h)); }
      if(s !== null) { s = Math.max(0.0, this.minS, Math.min(1.0, this.maxS, s)); }
      if(v !== null) { v = Math.max(0.0, this.minV, Math.min(1.0, this.maxV, v)); }

      this.rgb = HSV_RGB(
        h===null ? this.hsv[0] : (this.hsv[0]=h),
        s===null ? this.hsv[1] : (this.hsv[1]=s),
        v===null ? this.hsv[2] : (this.hsv[2]=v)
      );

      this.exportColor(flags);
    };


    this.fromRGB = function(r, g, b, flags) { // null = don't change
      if(r !== null) { r = Math.max(0.0, Math.min(1.0, r)); }
      if(g !== null) { g = Math.max(0.0, Math.min(1.0, g)); }
      if(b !== null) { b = Math.max(0.0, Math.min(1.0, b)); }

      var hsv = RGB_HSV(
        r===null ? this.rgb[0] : r,
        g===null ? this.rgb[1] : g,
        b===null ? this.rgb[2] : b
      );
      if(hsv[0] !== null) {
        this.hsv[0] = Math.max(0.0, this.minH, Math.min(6.0, this.maxH, hsv[0]));
      }
      if(hsv[2] !== 0) {
        this.hsv[1] = hsv[1]===null ? null : Math.max(0.0, this.minS, Math.min(1.0, this.maxS, hsv[1]));
      }
      this.hsv[2] = hsv[2]===null ? null : Math.max(0.0, this.minV, Math.min(1.0, this.maxV, hsv[2]));

      // update RGB according to final HSV, as some values might be trimmed
      var rgb = HSV_RGB(this.hsv[0], this.hsv[1], this.hsv[2]);
      this.rgb[0] = rgb[0];
      this.rgb[1] = rgb[1];
      this.rgb[2] = rgb[2];

      this.exportColor(flags);
    };


    this.fromString = function(hex, flags) {
      var m = hex.match(/^\W*([0-9A-F]{3}([0-9A-F]{3})?)\W*$/i);
      if(!m) {
        return false;
      } else {
        if(m[1].length === 6) { // 6-char notation
          this.fromRGB(
            parseInt(m[1].substr(0,2),16) / 255,
            parseInt(m[1].substr(2,2),16) / 255,
            parseInt(m[1].substr(4,2),16) / 255,
            flags
          );
        } else { // 3-char notation
          this.fromRGB(
            parseInt(m[1].charAt(0)+m[1].charAt(0),16) / 255,
            parseInt(m[1].charAt(1)+m[1].charAt(1),16) / 255,
            parseInt(m[1].charAt(2)+m[1].charAt(2),16) / 255,
            flags
          );
        }
        return true;
      }
    };


    this.toString = function() {
      return (
        (0x100 | Math.round(255*this.rgb[0])).toString(16).substr(1) +
        (0x100 | Math.round(255*this.rgb[1])).toString(16).substr(1) +
        (0x100 | Math.round(255*this.rgb[2])).toString(16).substr(1)
      );
    };


    function RGB_HSV(r, g, b) {
      var n = Math.min(Math.min(r,g),b);
      var v = Math.max(Math.max(r,g),b);
      var m = v - n;
      if(m === 0) { return [ null, 0, v ]; }
      var h = r===n ? 3+(b-g)/m : (g===n ? 5+(r-b)/m : 1+(g-r)/m);
      return [ h===6?0:h, m/v, v ];
    }


    function HSV_RGB(h, s, v) {
      if(h === null) { return [ v, v, v ]; }
      var i = Math.floor(h);
      var f = i%2 ? h-i : 1-(h-i);
      var m = v * (1 - s);
      var n = v * (1 - s*f);
      switch(i) {
        case 6:
        case 0: return [v,n,m];
        case 1: return [n,v,m];
        case 2: return [m,v,n];
        case 3: return [m,n,v];
        case 4: return [n,m,v];
        case 5: return [v,m,n];
      }
    }


    function removePicker() {
      delete jscolor.picker.owner;
      document.getElementsByTagName('body')[0].removeChild(jscolor.picker.boxB);
    }


    function drawPicker(x, y) {
      if(!jscolor.picker) {
        jscolor.picker = {
          box : document.createElement('div'),
          boxB : document.createElement('div'),
          pad : document.createElement('div'),
          padB : document.createElement('div'),
          padM : document.createElement('div'),
          sld : document.createElement('div'),
          sldB : document.createElement('div'),
          sldM : document.createElement('div'),
          btn : document.createElement('div'),
          btnS : document.createElement('span'),
          btnT : document.createTextNode(THIS.pickerCloseText)
        };
        for(var i=0,segSize=4; i<jscolor.images.sld[1]; i+=segSize) {
          var seg = document.createElement('div');
          seg.style.height = segSize+'px';
          seg.style.fontSize = '1px';
          seg.style.lineHeight = '0';
          jscolor.picker.sld.appendChild(seg);
        }
        jscolor.picker.sldB.appendChild(jscolor.picker.sld);
        jscolor.picker.box.appendChild(jscolor.picker.sldB);
        jscolor.picker.box.appendChild(jscolor.picker.sldM);
        jscolor.picker.padB.appendChild(jscolor.picker.pad);
        jscolor.picker.box.appendChild(jscolor.picker.padB);
        jscolor.picker.box.appendChild(jscolor.picker.padM);
        jscolor.picker.btnS.appendChild(jscolor.picker.btnT);
        jscolor.picker.btn.appendChild(jscolor.picker.btnS);
        jscolor.picker.box.appendChild(jscolor.picker.btn);
        jscolor.picker.boxB.appendChild(jscolor.picker.box);
      }

      var p = jscolor.picker;

      // controls interaction
      p.box.onmouseup =
      p.box.onmouseout = function() { target.focus(); };
      p.box.onmousedown = function() { abortBlur=true; };
      p.box.onmousemove = function(e) {
        if (holdPad || holdSld) {
          holdPad && setPad(e);
          holdSld && setSld(e);
          if (document.selection) {
            document.selection.empty();
          } else if (window.getSelection) {
            window.getSelection().removeAllRanges();
          }
          dispatchImmediateChange();
        }
      };
      p.padM.onmouseup =
      p.padM.onmouseout = function() { if(holdPad) { holdPad=false; jscolor.fireEvent(valueElement,'change'); } };
      p.padM.onmousedown = function(e) {
        // if the slider is at the bottom, move it up
        switch(modeID) {
          case 0: if (THIS.hsv[2] === 0) { THIS.fromHSV(null, null, 1.0); }; break;
          case 1: if (THIS.hsv[1] === 0) { THIS.fromHSV(null, 1.0, null); }; break;
        }
        holdPad=true;
        setPad(e);
        dispatchImmediateChange();
      };
      p.sldM.onmouseup =
      p.sldM.onmouseout = function() { if(holdSld) { holdSld=false; jscolor.fireEvent(valueElement,'change'); } };
      p.sldM.onmousedown = function(e) {
        holdSld=true;
        setSld(e);
        dispatchImmediateChange();
      };

      // picker
      var dims = getPickerDims(THIS);
      p.box.style.width = dims[0] + 'px';
      p.box.style.height = dims[1] + 'px';

      // picker border
      p.boxB.style.position = 'absolute';
      p.boxB.style.clear = 'both';
      p.boxB.style.left = x+'px';
      p.boxB.style.top = y+'px';
      p.boxB.style.zIndex = THIS.pickerZIndex;
      p.boxB.style.border = THIS.pickerBorder+'px solid';
      p.boxB.style.borderColor = THIS.pickerBorderColor;
      p.boxB.style.background = THIS.pickerFaceColor;

      // pad image
      p.pad.style.width = jscolor.images.pad[0]+'px';
      p.pad.style.height = jscolor.images.pad[1]+'px';

      // pad border
      p.padB.style.position = 'absolute';
      p.padB.style.left = THIS.pickerFace+'px';
      p.padB.style.top = THIS.pickerFace+'px';
      p.padB.style.border = THIS.pickerInset+'px solid';
      p.padB.style.borderColor = THIS.pickerInsetColor;

      // pad mouse area
      p.padM.style.position = 'absolute';
      p.padM.style.left = '0';
      p.padM.style.top = '0';
      p.padM.style.width = THIS.pickerFace + 2*THIS.pickerInset + jscolor.images.pad[0] + jscolor.images.arrow[0] + 'px';
      p.padM.style.height = p.box.style.height;
      p.padM.style.cursor = 'crosshair';

      // slider image
      p.sld.style.overflow = 'hidden';
      p.sld.style.width = jscolor.images.sld[0]+'px';
      p.sld.style.height = jscolor.images.sld[1]+'px';

      // slider border
      p.sldB.style.display = THIS.slider ? 'block' : 'none';
      p.sldB.style.position = 'absolute';
      p.sldB.style.right = THIS.pickerFace+'px';
      p.sldB.style.top = THIS.pickerFace+'px';
      p.sldB.style.border = THIS.pickerInset+'px solid';
      p.sldB.style.borderColor = THIS.pickerInsetColor;

      // slider mouse area
      p.sldM.style.display = THIS.slider ? 'block' : 'none';
      p.sldM.style.position = 'absolute';
      p.sldM.style.right = '0';
      p.sldM.style.top = '0';
      p.sldM.style.width = jscolor.images.sld[0] + jscolor.images.arrow[0] + THIS.pickerFace + 2*THIS.pickerInset + 'px';
      p.sldM.style.height = p.box.style.height;
      try {
        p.sldM.style.cursor = 'pointer';
      } catch(eOldIE) {
        p.sldM.style.cursor = 'hand';
      }

      // "close" button
      function setBtnBorder() {
        var insetColors = THIS.pickerInsetColor.split(/\s+/);
        var pickerOutsetColor = insetColors.length < 2 ? insetColors[0] : insetColors[1] + ' ' + insetColors[0] + ' ' + insetColors[0] + ' ' + insetColors[1];
        p.btn.style.borderColor = pickerOutsetColor;
      }
      p.btn.style.display = THIS.pickerClosable ? 'block' : 'none';
      p.btn.style.position = 'absolute';
      p.btn.style.left = THIS.pickerFace + 'px';
      p.btn.style.bottom = THIS.pickerFace + 'px';
      p.btn.style.padding = '0 15px';
      p.btn.style.height = '18px';
      p.btn.style.border = THIS.pickerInset + 'px solid';
      setBtnBorder();
      p.btn.style.color = THIS.pickerButtonColor;
      p.btn.style.font = '12px sans-serif';
      p.btn.style.textAlign = 'center';
      try {
        p.btn.style.cursor = 'pointer';
      } catch(eOldIE) {
        p.btn.style.cursor = 'hand';
      }
      p.btn.onmousedown = function () {
        THIS.hidePicker();
      };
      p.btnS.style.lineHeight = p.btn.style.height;

      // load images in optimal order
      switch(modeID) {
        case 0: var padImg = 'hs.png'; break;
        case 1: var padImg = 'hv.png'; break;
      }
      p.padM.style.backgroundImage = "url('"+jscolor.getDir()+"cross.gif')";
      p.padM.style.backgroundRepeat = "no-repeat";
      p.sldM.style.backgroundImage = "url('"+jscolor.getDir()+"arrow.gif')";
      p.sldM.style.backgroundRepeat = "no-repeat";
      p.pad.style.backgroundImage = "url('"+jscolor.getDir()+padImg+"')";
      p.pad.style.backgroundRepeat = "no-repeat";
      p.pad.style.backgroundPosition = "0 0";

      // place pointers
      redrawPad();
      redrawSld();

      jscolor.picker.owner = THIS;
      document.getElementsByTagName('body')[0].appendChild(p.boxB);
    }


    function getPickerDims(o) {
      var dims = [
        2*o.pickerInset + 2*o.pickerFace + jscolor.images.pad[0] +
          (o.slider ? 2*o.pickerInset + 2*jscolor.images.arrow[0] + jscolor.images.sld[0] : 0),
        o.pickerClosable ?
          4*o.pickerInset + 3*o.pickerFace + jscolor.images.pad[1] + o.pickerButtonHeight :
          2*o.pickerInset + 2*o.pickerFace + jscolor.images.pad[1]
      ];
      return dims;
    }


    function redrawPad() {
      // redraw the pad pointer
      switch(modeID) {
        case 0: var yComponent = 1; break;
        case 1: var yComponent = 2; break;
      }
      var x = Math.round((THIS.hsv[0]/6) * (jscolor.images.pad[0]-1));
      var y = Math.round((1-THIS.hsv[yComponent]) * (jscolor.images.pad[1]-1));
      jscolor.picker.padM.style.backgroundPosition =
        (THIS.pickerFace+THIS.pickerInset+x - Math.floor(jscolor.images.cross[0]/2)) + 'px ' +
        (THIS.pickerFace+THIS.pickerInset+y - Math.floor(jscolor.images.cross[1]/2)) + 'px';

      // redraw the slider image
      var seg = jscolor.picker.sld.childNodes;

      switch(modeID) {
        case 0:
          var rgb = HSV_RGB(THIS.hsv[0], THIS.hsv[1], 1);
          for(var i=0; i<seg.length; i+=1) {
            seg[i].style.backgroundColor = 'rgb('+
              (rgb[0]*(1-i/seg.length)*100)+'%,'+
              (rgb[1]*(1-i/seg.length)*100)+'%,'+
              (rgb[2]*(1-i/seg.length)*100)+'%)';
          }
          break;
        case 1:
          var rgb, s, c = [ THIS.hsv[2], 0, 0 ];
          var i = Math.floor(THIS.hsv[0]);
          var f = i%2 ? THIS.hsv[0]-i : 1-(THIS.hsv[0]-i);
          switch(i) {
            case 6:
            case 0: rgb=[0,1,2]; break;
            case 1: rgb=[1,0,2]; break;
            case 2: rgb=[2,0,1]; break;
            case 3: rgb=[2,1,0]; break;
            case 4: rgb=[1,2,0]; break;
            case 5: rgb=[0,2,1]; break;
          }
          for(var i=0; i<seg.length; i+=1) {
            s = 1 - 1/(seg.length-1)*i;
            c[1] = c[0] * (1 - s*f);
            c[2] = c[0] * (1 - s);
            seg[i].style.backgroundColor = 'rgb('+
              (c[rgb[0]]*100)+'%,'+
              (c[rgb[1]]*100)+'%,'+
              (c[rgb[2]]*100)+'%)';
          }
          break;
      }
    }


    function redrawSld() {
      // redraw the slider pointer
      switch(modeID) {
        case 0: var yComponent = 2; break;
        case 1: var yComponent = 1; break;
      }
      var y = Math.round((1-THIS.hsv[yComponent]) * (jscolor.images.sld[1]-1));
      jscolor.picker.sldM.style.backgroundPosition =
        '0 ' + (THIS.pickerFace+THIS.pickerInset+y - Math.floor(jscolor.images.arrow[1]/2)) + 'px';
    }


    function isPickerOwner() {
      return jscolor.picker && jscolor.picker.owner === THIS;
    }


    function blurTarget() {
      if(valueElement === target) {
        THIS.importColor();
      }
      if(THIS.pickerOnfocus) {
        THIS.hidePicker();
      }
    }


    function blurValue() {
      if(valueElement !== target) {
        THIS.importColor();
      }
    }


    function setPad(e) {
      var mpos = jscolor.getRelMousePos(e);
      var x = mpos.x - THIS.pickerFace - THIS.pickerInset;
      var y = mpos.y - THIS.pickerFace - THIS.pickerInset;
      switch(modeID) {
        case 0: THIS.fromHSV(x*(6/(jscolor.images.pad[0]-1)), 1 - y/(jscolor.images.pad[1]-1), null, leaveSld); break;
        case 1: THIS.fromHSV(x*(6/(jscolor.images.pad[0]-1)), null, 1 - y/(jscolor.images.pad[1]-1), leaveSld); break;
      }
    }


    function setSld(e) {
      var mpos = jscolor.getRelMousePos(e);
      var y = mpos.y - THIS.pickerFace - THIS.pickerInset;
      switch(modeID) {
        case 0: THIS.fromHSV(null, null, 1 - y/(jscolor.images.sld[1]-1), leavePad); break;
        case 1: THIS.fromHSV(null, 1 - y/(jscolor.images.sld[1]-1), null, leavePad); break;
      }
    }


    function dispatchImmediateChange() {
      if (THIS.onImmediateChange) {
        var callback;
        if (typeof THIS.onImmediateChange === 'string') {
          callback = new Function (THIS.onImmediateChange);
        } else {
          callback = THIS.onImmediateChange;
        }
        callback.call(THIS);
      }
    }


    var THIS = this;
    var modeID = this.pickerMode.toLowerCase()==='hvs' ? 1 : 0;
    var abortBlur = false;
    var
      valueElement = jscolor.fetchElement(this.valueElement),
      styleElement = jscolor.fetchElement(this.styleElement);
    var
      holdPad = false,
      holdSld = false;
    var
      leaveValue = 1<<0,
      leaveStyle = 1<<1,
      leavePad = 1<<2,
      leaveSld = 1<<3;

    // target
    jscolor.addEvent(target, 'focus', function() {
      if(THIS.pickerOnfocus) { THIS.showPicker(); }
    });
    jscolor.addEvent(target, 'blur', function() {
      if(!abortBlur) {
        window.setTimeout(function(){ abortBlur || blurTarget(); abortBlur=false; }, 0);
      } else {
        abortBlur = false;
      }
    });

    // valueElement
    if(valueElement) {
      var updateField = function() {
        THIS.fromString(valueElement.value, leaveValue);
        dispatchImmediateChange();
      };
      jscolor.addEvent(valueElement, 'keyup', updateField);
      jscolor.addEvent(valueElement, 'input', updateField);
      jscolor.addEvent(valueElement, 'blur', blurValue);
      valueElement.setAttribute('autocomplete', 'off');
    }

    // styleElement
    if(styleElement) {
      styleElement.jscStyle = {
        backgroundImage : styleElement.style.backgroundImage,
        backgroundColor : styleElement.style.backgroundColor,
        color : styleElement.style.color
      };
    }

    // require images
    switch(modeID) {
      case 0: jscolor.requireImage('hs.png'); break;
      case 1: jscolor.requireImage('hv.png'); break;
    }
    jscolor.requireImage('cross.gif');
    jscolor.requireImage('arrow.gif');

    this.importColor();
  }

};


jscolor.install();