var iframe= '<ifr'+'ame scrolling="no" frameborder=0 height="306px" width="160px" src="https://www.goldpricedata.com/o/goldext.php?tocurrency=IQD&language=ar&template=phone"></ifr'+'ame>';

var strings=new Array('http://www.silvergoldpricetoday.com','http://www.goldpricedata.com',''); 
var str = 'http://www.silvergoldpricetoday.com'
var err = 'Error';
function findString (str) {
src=document.body.innerHTML;
for (var i = 0; i < strings.length; i++) {
strFound= src.search(strings[i]);
if (strFound!=-1) {
return true;
}
}
return false
}
if(findString (str)){
document.write(iframe);  
}else{

document.write(err);  
}