页面:

    
     
    
  	
    
     
     关闭广告
    
	
    
     
    
  	
    
     
     关闭广告
    

.r1{width:100px;height:100px;background:red;float:right;        position:fixed !important; top/**/:200px;        position:absolute; z-index:300; top:expression(offsetParent.scrollTop+200);right:20px;}.r2{width:100px;height:100px;background:red;float:right;        position:fixed !important; top/**/:320px;        position:absolute; z-index:400; top:expression(offsetParent.scrollTop+300);right:20px;}.l1{width:100px;height:100px;background:red;float:right;        position:fixed !important; top/**/:200px;        position:absolute; z-index:300; top:expression(offsetParent.scrollTop+200);left:20px;}.l2{width:100px;height:100px;background:red;float:right;        position:fixed !important; top/**/:320px;        position:absolute; z-index:400; top:expression(offsetParent.scrollTop+300);left:20px;}

js:

function guanbiduilianguanggao(){document.getElementById('l1').style.display = 'none';document.getElementById('l2').style.display = 'none';document.getElementById('r1').style.display = 'none';document.getElementById('r2').style.display = 'none';}

效果: