function showdiv(targetid,objN){
var target=document.getElementById(targetid);
var clicktext=document.getElementById(objN)
if (target.style.display=="block")
{ target.style.display="none";
clicktext.innerText="打开";
} else { target.style.display="block"; clicktext.innerText='关闭'; }
iframe.src="http://www.baidu.com";
}
#b1,#b2,#b3{ cursor: hand; cursor:pointer;}
#v1,#v2 ,#v3{width:100%; height:300px }
.none { display: none; }
-->
';showdiv('v1','b1');"type=button value=online1>
