Specific methods of implementing jump menu in javascript_javascript skills

Tradition

What you need to do here is to omit the Go There button and jump directly after selecting the menu item.

Html code

Copy code The code is as follows:

Select a topic< /option>
  topic1
topic2
topic3
/option>

="submit" value="Go There!"/>

🎜>
Javascript script

Copy code

The code is as follows:window.onload=initForm ; //Prevent page caching and cannot trigger onload window.onunload=function(){}

function initForm(){

document.getElementById("newLocation").selectIndex=0;
document.getElementById("newLocation").onchange=jumpPage;
function jumpPage(){
var newLoc=document.getElementById("newLocation");
var newPage=newLoc. options[newLoc.selectedIndex].value;
if (newPage!=""){
window.location=newPage;
}