function getParam(strParamName)
{
    
    var strReturn = "";
	var strHref = window.location.href;
	
	if ( strHref.indexOf("?") > -1 )
	{
	    strParamName = strParamName.toLowerCase();
	    var strQueryString = strHref.substr(strHref.indexOf("?") + 1).toLowerCase();
		var aQueryString = strQueryString.split("&");
		var lastArray;
		
		for ( var iParam = 0; iParam < aQueryString.length; iParam++)
		{
		    lastArray = aQueryString[iParam].split("=");
			if(lastArray[0] == strParamName) 
			{
			    strReturn = lastArray[1];
				    break;
            }
        }
    } 
		return strReturn;
}