Added check browser method. Fixes #40.

index.html

@@ -57,16 +57,12 @@
 
 function toggle(dialogId)
 {
-    if( $(dialogId).dialog('isOpen') )
-    {
-        $(dialogId).dialog('close');
-    }
-    else
-    {
-        $(dialogId).dialog('open');
-    }
+    if( $(dialogId).dialog('isOpen') ) $(dialogId).dialog('close');
+    else $(dialogId).dialog('open');
 }
 
+// check browser support
+dwv.html.checkBrowser();
 // main application
 var app = new dwv.App();
 

index.m.html

@@ -53,6 +53,8 @@
 
 <script type="text/javascript">
 
+//check browser support
+dwv.html.checkBrowser();
 // main application
 var app = new dwv.App(true);
 

src/html/html.js

@@ -404,3 +404,30 @@ dwv.html.toggleDisplay = function(id)
     }
 };
 
+/**
+ * Browser checks to see if it can run dwv...
+ * TODO Maybe use http://modernizr.com/.
+ */ 
+dwv.html.checkBrowser = function()
+{
+    var appnorun = "The application cannot be run.";
+    // Check for the File API support
+    if( !window.FileReader ) {
+        var message = "The File APIs are not supported in this browser. ";
+        alert(message+appnorun);
+        throw new Error(message);
+    }
+    // Check for XMLHttpRequest
+    if( !window.XMLHttpRequest || !("withCredentials" in new XMLHttpRequest) ) {
+      var message = "The XMLHttpRequest is not supported in this browser. ";
+      alert(message+appnorun);
+      throw new Error(message);
+    }
+    // Check typed array
+    if( !window.Uint8Array || !window.Uint16Array ) {
+        var message = "The Typed arrays are not supported in this browser. ";
+        alert(message+appnorun);
+        throw new Error(message);
+    }
+};
+