How to remove specific elements of an array from JavaScript

First, find the index of the element that you want to erase.

var array = [2, 5, 9];
var index = array.indexOf(5);

However, indexOf is not supported on Internet Explorer 7 and 8.

if (index > -1) {
    array.splice(index, 1);
}

In this way, use splice to erase it. The second parameter in the splice indicates the number of elements to erase. The example above means that we're going to erase only one from the first parameter.