//specify path to your external page:
				var iframesrc="external.htm"
				//You may change most attributes of iframe tag below, such as width and height:
				document.write('<iframe id="datamain" src="'+iframesrc+'" width="345px" height="500px" marginwidth="0" marginheight="0" hspace="0" vspace="0" frameborder="1" scrolling="no"></iframe>')