Fastest way to remove all items from dropdown list or listbox?

Question

I have a dropdown list with more than one thousand items. Once I click on clear button it should clear all items. For removing I tried looping.

What would be the fastest way to remove all items from a dropdown list or listbox?

Answer 1

Set innerHTML of select box as empty string.

var selectBox = document.getElementById("selectboxID");
selectBox.innerHTML = "";

Answer 2

如果使用的是jQuery，请选择以下选项：

$("#selectboxID").empty();

Answer 3

Thanks for the quick reply How about this?? document.getElementById(id).options.length = 0;