javascript ÅжÏÎļþÊÇ·ñ´æÔÚ ÕûÀí

javascript ÅжÏÎļþÊÇ·ñ´æÔÚ
<title>³£ÓÃÏÂÔØ</title>
    <script type="text/javascript" >      
//ÅжϷþÎñÆ÷ÉϵÄÎļþ£¨ÍøÂçÎļþÊÇ·ñ´æÔÚ£©    
function getURL()  
      {          
          
          var objDiv=document.getElementById ("show");
          var objs=objDiv.childNodes;
          for(var i=0;i<objs.length;i++)
          {
              if(objs.tagName=="A")
              {
                  var objA=objs;
                  var url=objA.href;
                  var xmlhttp =new ActiveXObject("microsoft.XMLHTTP");  
                  xmlhttp.open("HEAD",url,false);  
                  xmlhttp.send();  
                  if(xmlhttp.readyState==4)            
              &nbs