function get_url_param(name) { 
	name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]"); 
	var regexS = "[\\?&]"+name+"=([^&#]*)"; 
	var regex = new RegExp( regexS ); 
	var results = regex.exec( window.location.href ); 
	if( results == null )    return ""; 
	else return results[1];
}