var FloatDiv = {
	Float : function (){
		var xtop = document.documentElement.scrollTop || document.body.scrollTop;
		for(var i = 0; i < arguments.length; i ++){
			var _float = document.getElementById(arguments[i]);
			_float.style.top = "80%";
			_float.style.marginTop = parseFloat(xtop) - parseFloat(_float.clientHeight) / 2 + "px";
		}
	},
	Close : function (){
		for(var i = 0; i < arguments.length; i ++){
			var _float = document.getElementById(arguments[i]);
			_float.style.display = "none";
		}
	}
};
//window.onscroll = function () {FloatDiv.Float("float1", "float2");}
window.onscroll = function () {FloatDiv.Float("float12", "float22");}