function calcHeight() {

if (document.getElementById('iframe1').contentWindow.document.title != 'Quality Home Roofing Picture') { 
  document.getElementById('roofing').style.display='none';
 } else {
  document.getElementById('roofing').style.display='table-cell';
 }

 window.scroll(0,0);
 if (location.href.indexOf("q=cache:") > -1) { return; }
 
  document.getElementById('iframe1').style.height= '300px'; //reset size
	if (document.all)  {
	    var newheight = document.getElementById('iframe1').contentWindow.document.body.scrollHeight; //explorer
	} else if (document.getElementById) {
	    var newheight = document.getElementById('iframe1').contentDocument.height; //netscape 8
	} else if (document.layers)  {
	    var newheight = document.getElementById('iframe1').contentDocument.height; //netscape 4
	}
	  document.getElementById('iframe1').style.height= newheight+'px';
}