function ShowPopUp( DivPopUpID, DivMainID ) {
	var DivMain = document.getElementById(DivMainID);
	if ( DivMain != null ){
		DivMain.disabled = true;
	}

	var DivPopUp = document.getElementById(DivPopUpID);
	if ( DivPopUp != null ){
		DivPopUp.style.display = "block";
	}
}

function HidePopUp( DivPopUpID, DivMainID ){
	var DivMain = document.getElementById(DivMainID);
	if ( DivMain != null ){
		DivMain.style.display = "block";
		DivMain.disabled = false;
	}

	var DivPopUp = document.getElementById(DivPopUpID);
	if ( DivPopUp != null ){
		DivPopUp.style.display = "none";
	}
}


   var http_request = false;
   function makeRequest(url, parameters) {
      http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
            http_request.overrideMimeType('text/xml');
         }
      } else if (window.ActiveXObject) { // IE
         try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
      }
      if (!http_request) {
         alert('Cannot create XMLHTTP instance');
         return false;
      }
      http_request.onreadystatechange = mostraConteudo;
      http_request.open('GET', url + parameters, true);
      http_request.send(null);
   }

   function mostraConteudo() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {

            xmldoc = http_request.responseXML;
			xmlEle=http_request.responseXML.documentElement;
			
			var url = xmldoc.getElementsByTagName('url').item(0).textContent;
			var title = xmldoc.getElementsByTagName('title').item(0).textContent;
			var description = xmldoc.getElementsByTagName('description').item(0).textContent;
			var keywords = xmldoc.getElementsByTagName('keywords').item(0).textContent;
			document.getElementById('titulo').value=title;
			document.getElementById('descricao').value=description;
			document.getElementById('tags').value=keywords;
         } else {
            alert('Não foi possivel preencher os campos automáticamente.\n Url incorrecta, ou problema temporário no acesso ao website.');
         }
      }
   }
   function get_site_info() {
	var url=document.getElementById('url').value;
	if (url.length>0) {
		makeRequest("/utils/get_page_info.php", "?url="+url);
	} else {
		alert('Por favor insira uma url válida.');
	}
   }