Javascript - URL 基于下拉选择 - 如果所有下拉变量均为空白，则转到特定的 URL

Question

This is my code so far: http://jsfiddle.net/zY3xx/

I have a blank option in all 3 dropdowns, and I want to modify the existing Javascript so that it goes to a specific URL if all 3 dropdowns have the blank option selected. The Variable is literally left empty, so it should be something along the lines of:

if newURL = "" then goto "http://mycustomurl.com"

I'm just not sure how to implement that option in Javascript.

Does anyone know how?

Answer 1

Try this :

    if (newUrl.length === 0) {
        newUrl = 'http://google.com';
    }