/**********20140521***************/
.toTop{
	 width:142px;
    height:500px;
	
	cursor:pointer;
     position: fixed;
    _position: absolute;
	/*********left: 50%;*********/
	margin-left: -13px;
	top: 50%;
	margin-top: -200px;
	z-index:9999;
	_top: expression(eval(document.documentElement.scrollTop+document.documentElement.clientHeight-this.offsetHeight-(parseInt(this.currentStyle.marginTop, 10)||0)-(parseInt(this.currentStyle.marginBottom, 10)||0)));}