var IFrameObj; // our IFrame object
var stopped=false;
function lookup_call(url) {

	if (! stopped) {
	  if (!document.createElement) {return true};
	  var IFrameDoc;
	  var URL = url;
	  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:100px;';
		  iframeHTML+='height:100px;';
		  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('lookup_call()',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;
	 }
}