Java SE (Java Platform, Standard Edition)

Hi,

I have this requirement that before launching the jnlp application, the code should check the version of JRE installed on client's system, if it is less than 1.6 u10 then install the latest available JRE before launching the application.

I am using the Java Script in my jsp to achieve this objective and it is working fine with non-IE web browsers. The trouble starts when the client machine is using 1.6.0_6 jre, in that case IE is not able to download /redirect user to the sun's page for the download of latest JRE.

My java script code as follows:

<script language="JavaScript">
var launch = null;

// try to check the JRE version installed on client's machine.
//if its less than 1.6.10 redirect to Sun Micro systems website.
//and then after installation, launch Receptionst and Call Center application
function checkForInstalledJreVersionAndLaunch(appName)
{
	//detect browser used at client's machine
	var windowsIE = (navigator.userAgent.indexOf('MSIE') != -1) && (navigator.userAgent.indexOf('Win') != -1);
	if (windowsIE) {
		alert(windowsIE);
    	document.write("<OBJECT codeBase=\"http://java.sun.com/update/1.6.0/jinstall-6u10-windows-i586.cab#Version=6,0,10,0\" classid=\"clsid:5852F5ED-8BF4-11D4-A245-0080C6F74284\" height=0 width=0>");
    	document.write("<PARAM name=app VALUE=\"http://localhost:8080/"+appName+"/launch.jnlp\">");
		document.write("<PARAM NAME=back VALUE=true>");
		document.write("</OBJECT>");
 	}else{
 		if (navigator.mimeTypes && navigator.mimeTypes.length)
 		{
 			if(!checkWebStartWersion())
 			{
 				window.open("http://jdl.sun.com/webapps/getjava/BrowserRedirect?locale=en&host=java.com","needdownload");
 			}
 			launch = setInterval('launchJNLP("http://localhost:8080/'+appName+'/launch.jnlp")',100);
 		}
 	}
}

function launchJNLP(app) {
    if (checkWebStartWersion()) {
        clearInterval(launch);
        window.location = app;
    }
}

function checkWebStartWersion()
{
	var isMajorVersion = false;
	var isMinorVersion = false;
	navigator.plugins.refresh(true);
	if(navigator.mimeTypes['application/x-java-jnlp-file'])
	{
		for(var i=0;i <navigator.mimeTypes.length; i++)
		{
			var pluginType = navigator.mimeTypes.type;

			if(pluginType.indexOf("x-java-applet;jpi-version") > -1)

			{

				var jreVersion = pluginType.substring(pluginType.indexOf("_")+1,pluginType.length);

				var jreUpdateNumber = parseInt(jreVersion);



				if(jreUpdateNumber >= 10)

				{

					isMinorVersion = true;

				}

			}



			if(pluginType.indexOf("x-java-applet;version") > -1)

			{

				var jreVersion = pluginType.substring(pluginType.indexOf(".")+1,pluginType.length);

				var jreUpdateNumber = parseInt(jreVersion);



				if(jreUpdateNumber >=6)

				{

					isMajorVersion = true;

				}

			}

		}

	}

	return (isMajorVersion && isMinorVersion);

}



function launchApplication()

{

	checkForInstalledJreVersionAndLaunch("appname");

}

</script>