function callToServer(URL) {
     
	
	if (!document.createElement ) {
	    return true
	};
	var IFrameDoc;
	
	
	
	var responseMessage = document.getElementById('responseMessage');
	responseMessage.style.display = 'inline';
	responseMessage.innerHTML = 'Cargando datos...';
	
	
	
	
	
	if (!IFrameObj && document.createElement) {
    // create the IFrame and assign a reference to the
    // object to our global variable IFrameObj.
    // this will only happen the first time 
    // callToServer() is called
   try {
      var tempIFrame=document.createElement('iframe');
      tempIFrame.setAttribute('id','RSIFrame');
      tempIFrame.style.border='0px';
      tempIFrame.style.width='0px';
      tempIFrame.style.height='0px';
      IFrameObj = document.body.appendChild(tempIFrame);
      
      if (document.frames) {
	        // this is for IE5 Mac, because it will only
	        // allow access to the document object
	        // of the IFrame if we access it through
	        // the document.frames array
	        IFrameObj = document.frames['RSIFrame'];
	      }
	    } catch(exception) {
	      // This is for IE5 PC, which does not allow dynamic creation
	      // and manipulation of an iframe object. Instead, we'll fake
	      // it up by creating our own objects.
	      iframeHTML='\<iframe id="RSIFrame" style="';
	      iframeHTML+='border:0px;';
	      iframeHTML+='width:0px;';
	      iframeHTML+='height:0px;';
	      iframeHTML+='"><\/iframe>';
	      document.body.innerHTML+=iframeHTML;
	      IFrameObj = new Object();
	      IFrameObj.document = new Object();
	      IFrameObj.document.location = new Object();
	      IFrameObj.document.location.iframe = document.getElementById('RSIFrame');
	      IFrameObj.document.location.replace = function(location) {
	        this.iframe.src = location;
	      }
	    }
	  }
	
	if (navigator.userAgent.indexOf('Gecko') !=-1 && !IFrameObj.contentDocument) {
		// we have to give NS6 a fraction of a second
		// to recognize the new IFrame
		//setTimeout('callToServer("'+nombreForm+'")',10);
		return false;
	}
	
	if (IFrameObj.contentDocument) {
		// For NS6
		IFrameDoc = IFrameObj.contentDocument; 
	} else if (IFrameObj.contentWindow) {
		// For IE5.5 and IE6
		IFrameDoc = IFrameObj.contentWindow.document;
	} else if (IFrameObj.document) {
		// For IE5
		IFrameDoc = IFrameObj.document;
	} else {
		return true;
	}
	
		
	IFrameDoc.location.replace(URL);
	
	
	
	return false;
}