if(window.addEventListener){
	window.addEventListener("load", setOverLayer, false);
	window.addEventListener("resize", setOverLayer, false);
}else if(window.attachEvent){
	window.attachEvent("onload", setOverLayer);
	window.attachEvent("onresize", setOverLayer);
}

function setOverLayer(){
	if(!document.getElementById('overLayer')) return;
	var obj = document.getElementById('overLayer');
	
	obj.style.height = ''; obj.style.minHeight = '';
	obj.style.width = ''; obj.style.minWidth = '';
	var h1 = parseInt(document.getElementsByTagName('body')[0].offsetHeight,10);
	var w1 = parseInt(document.getElementsByTagName('body')[0].offsetWidth,10);
	var h2 = parseInt(document.documentElement.clientHeight,10);
	var w2 = parseInt(document.documentElement.clientWidth,10);
	var h = (h1<h2)?h2:h1;
	var w = (w1<w2)?w2:w1;

	if(/MSIE/gi.test(navigator.userAgent)){
		var v = navigator.appVersion.match(/MSIE (\d+\.\d+)/, '');
		if(v != null && Number(v[1]) < 7){
			obj.style.height = h+'px';
			obj.style.width = w+'px';
		}else{
			obj.style.minHeight = h+'px';
			obj.style.minWidth = w+'px';
		}
	}else{
		obj.style.minHeight = h+'px';
		obj.style.minWidth = w+'px';
	}
	//document.title = 'h:'+h+', h1:'+h1+', h2:'+h2;
}