var target = "";
function jump(){
	var url = document.form1.select.options[document.form1.select.selectedIndex].value;
	if(url != "" ){
		if(target == 'top'){top.location.href = url;
		}else if(target == 'blank'){window.open(url, 'window_name');
		}else if(target != ""){eval('parent.' + target + '.location.href = url');
		}else{location.href = url;
		}
	}
}