HTML and javascript variables

How do you put a javascript variable into the value="" of an <input> box on a <form>

This must be easy but I do not开发者_JS百科 know.

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That's not hard. Have a look at the example below:

HTML:

<input id="id_of_your_element">

Javascript:

var yourvariable = "Hello world!";
document.getElementById("id_of_your_element").value = yourvariable;

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document.getElementById('element-id').value = 'The Value';

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Value="<script type="text/javascript">document.write(yourVariableName);</script>"

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You can do just:

document.getElementById('inputId').value = yourVariable;

You can also use the jQuery library, it will:

$('#inputId').val(yourVariable);

• jQuery : http://jquery.com/
• function .val: http://api.jquery.com/val/