//To check the browser is valid or not
function IsValidBrowser()
{
	var browserName=navigator.appName;
	//make sure the browser is IE and greater than version 5.0
	if (browserName=="Microsoft Internet Explorer")
	{
		if (getIEVersionNumber() >= 5)
			return 1;
	}
	return 0;
}

//To get IE Version Number
function getIEVersionNumber()
{
    var ua = navigator.userAgent;
    var MSIEOffset = ua.indexOf("MSIE ");
    if (MSIEOffset == -1) {
        return 0;
    } else {
        return parseFloat(ua.substring(MSIEOffset + 5, ua.indexOf(";", MSIEOffset)));
    }
}