function pngDisplayMethod()
{
	this.workaround = false;
	var aName = navigator.appName.toLowerCase();
	if (aName.indexOf("microsoft") == 0)
	{
		var rv= -1;
		var ua = navigator.userAgent;
		var re  = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
		if (re.exec(ua) != null)
		{
			rv = parseFloat( RegExp.$1 );
		}
		if (rv < 7)
		{
			this.workaround = true;
		}
	}
}

var aMethod = new pngDisplayMethod();

function giveDarkScreenContainer()
{
	if (aMethod.workaround == true)
	{
		document.write("<div id='darkScreenContainer' style='visibility:hidden;position:absolute;z-index:1;left:0px;top:0px;width:100%;height:100%;filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src=pics/levelSelectionBg.png, sizingMethod=scale);'>");
		document.write("</div>");
	}
	else
	{
		document.write("<img id='darkScreenContainer' style='visibility:hidden;position:absolute;left:0px;top:0px;width:100%;height:100%;z-index:1;' src='pics/levelSelectionBg.png'>");
	}
}