function go(tlist) {
var theList=document.getElementById(tlist);
theList.onchange=function() {
	theOptions=theList.options;
	for (i=0; i<theOptions.length; i++) {
		if (theOptions[i].selected==true && theOptions[i].value!="") {
			if (theOptions[i].className.match('same')) {
				window.location='http://'+theOptions[i].value;
				}
			else {
				window.open('http://'+theOptions[i].value);
				}
			}
		}
	}
}
window.onload=function() {go('cat');}