var Chick = {
	addEvent: function(sr,ev,fn,can){
		if(sr.addEventListener){
		sr.addEventListener(ev,fn,can);
		return true;
		}
		else if(sr.attachEvent){	
		var rel = sr.attachEvent("on"+ev,fn);
		return rel;
		}
		else{
		sr["on"+ev]=fn;
		}		
	},	
	getWAH:function(e){
		if(window.innerHeight){	//firefox		
			var h1 = window.innerHeight;
			var wh1 = window.innerWidth;
			var code = (h1 / 2)-54;
			var wcode =  (wh1 / 2)-236;
			
			document.getElementById("er").style.top = code + "px";		
			document.getElementById("er").style.left = wcode + "px";				
		}
		else if(document.documentElement && document.documentElement.clientHeight){			
				var h2 = document.documentElement.clientHeight;		
				var wh2 = document.documentElement.clientWidth;		
	var code2 = (h2 / 2)-54;
	var wcode2 =  (wh2 / 2)-236;
				document.getElementById("er").style.top = code2 + "px";				
				document.getElementById("er").style.left = wcode2 + "px";				
		}	
		else if (document.body && document.body.clientHeight) {// other Explorers
				alert("Your Html is not writen by Explorer 6 Strict Mode!! So there is a probrem as you can see.");
		}
	}
};
Chick.addEvent(window,"load",Chick.getWAH,false);
Chick.addEvent(window,"resize",Chick.getWAH,false);