var xmlhttp = null;
     
     if(window.XMLHttpRequest){
          xmlhttp = new XMLHttpRequest();
     }else{
          try{
               xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
          }catch(e){
               window.alert("Uw browser ondersteunt het XMLHttpRequest object niet!");
          }
     }
     
        function get_url(){
          var url = document.getElementById("url").value;
		  var tag = document.getElementById("tag").value;
		  var acao = document.getElementById("acao").value;
          xmlhttp.open("GET", "cad_url.php?url=" + url +"&tag=" + tag + "&acao="+ acao, true);
          xmlhttp.onreadystatechange = show_url;
		  document.getElementById("busca_url").style.display = "inline";
          xmlhttp.send('');
     }
   
     function show_url(){
          if(xmlhttp.readyState == 4){
			document.getElementById("busca_url").style.display = "none";
			document.getElementById("url_uitput").innerHTML = xmlhttp.responseText;
			document.getElementById("url").value= "";//limpa os campos
			document.getElementById("tag").value= "";

	     }
      }	  
function facha_laco(){
	get('loading').innerHTML 	= '';
}