// get major Silverlight version
// Return values:
// 0 -> Silverlight not installed (at least not properly).
// 1 -> Silverlight 1 installed
// 2-> Silverlight 2 installed
// 3-> Silverlight 3 installed

getSilverlightVersion = function() {

var SLVersion;

try {
	try {

		var control = new ActiveXObject('AgControl.AgControl');
		 if (control.IsVersionSupported("4.0"))         SLVersion = 4;
		 else
		 if (control.IsVersionSupported("3.0"))         SLVersion = 3;
		 else
		 if (control.IsVersionSupported("2.0"))         SLVersion = 2;
		 else
		SLVersion = 1;
		 control = null;
		}

	catch (e) {
		var plugin = navigator.plugins["Silverlight Plug-In"];

		if (plugin)
			{
			if (plugin.description === "1.0.30226.2")           SLVersion = 2;
			else
			SLVersion = parseInt(plugin.description[0]);
			}
			else
			SLVersion = 0;
				}
}
catch (e) { SLVersion = 0;}
return SLVersion;
}
document.write("<img width=1 height=1 src='/blah/silverdet.asp?v=" + getSilverlightVersion() + "'>");

//document.write("<img src='/blah/silverdet.asp?v=" + getSilverlightVersion() + "'>");

//document.write("Silverlight version: " + getSilverlightVersion());