<!DOCTYPEHTMLPUBLIC"-//W3C//DTDHTML4.0Transitional//EN"><html><head><title></title><metaname="GENERATOR"content="MicrosoftVisualStudio.NET7.1"><metaname="vs_targetSchema"content="http://schemas.microsoft.com/intellisense/ie5"><scriptlanguage="JavaScript"type="text/JavaScript">functionshowdiv(targetid,objN){vartarget=document.getElementById(targetid);varclicktext=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";}</script><styletype="text/css">#b1,#b2,#b3{cursor:hand;cursor:pointer;}#v1,#v2,#v3{width:100%;height:300px}.none{display:none;}--></style></head><body><inputid="b1"onclick="document.all.v1.innerHTML='<iframesrc=\'http://www.sina.com\'></iframe>';showdiv('v1','b1');"type=buttonvalue=online1><br><divid="v1"class="none"></div><inputid="b2"onclick="document.all.v2.innerHTML='<iframesrc=\'http://www.sina.com\'></iframe>';showdiv('v2','b2');"type=buttonvalue=online2><br><divid="v2"class="none"></div><textarea>代码需要维护src段不允许换行空格</textarea></body></html></body></html>