EncodeURIComponent throwing “Object doesn't support this property or method” Error (IE 8)

Question

下面的行抛出了一个不支持该属性或方法的对象” Windows XP上的IE 8.0.6上的错误。我已经研究了encodeURIComponent方法，却找不到其他遇到此问题的人。这是我的在这里发布，还是一定要其他？谢谢！

request_type = encodeURIComponent(document.getElementById("request_type").value);

Answer 1

It might actually be complaining about ".value"

Try breaking the code up like this:

var el = document.getElementById("request_type");
var val = el.value;
var encodedVal = encodeURIComponent(val);

If the script dies on the second line, then that means line 1 is trying to get an element that doesn't exist.