var anchors = document.getElementsByName('popup'); for(var n = 0; n < anchors.length; ++n) { anchors[n].onclick=function() { var img = new Image; img.onload = function() { var win = window.open('', '', 'width='+this.width+',height='+this.height); win.document.open('text/html', 'replace'); win.document.writeln(''+ '

' ); win.document.close(); } img.src = this.href; return false; } }