function getScreenSize(){
	var w = document.documentElement.clientWidth;
	var h = document.documentElement.clientHeight;
	return Array(w,h);
}

function getParam(name){
	
    var loc = location.search;
    var pos = loc.indexOf(name);
	
    if (pos < 0) 
		return null;
	
    var len = pos+name.length+1;
    var param = loc.substring(len);
	
    if (param.indexOf('&') > 0)
		param = param.substring(0, param.indexOf('&'));
    
	return param;
	
}