document.getElementById in array

Question

Code:

<div id="test"></div>
<script type="text/javascript">
    var elem = document.getElementById("test");
    elem.id = 1;
    alert(elem.id);
</script>

Can I save elem and elem.id in array? I don't know how. I tried:

var elem[0] = document.getElementById("test");
elem[0].id = 1;
alert(elem[0].id);

Answer 1

You almost got it. First you need to create the array:

var elements = [];

Then you can put items in it:

elements[0] = document.getElementById("test");
elements[0].id = 1;
alert(elements[0].id);

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You can also use the push method of Array objects. Also note: the id property of an element is a string, and as such your number will be converted to the string "1" .