How can I Get input value with Prototype?

I have the following input without any form around it:

<input type="text" value="myValue" name="td_website static" class="td_inner_input">

How can I get the Input value with prototype? I tried 开发者_JAVA百科to use alert($('tb_website static').value);, but it doesn't work.

alert($$('[name="td_website static"]')[0].value)

You need to use the $$ function which returns an array. There are a couple of ways to use an enumerable result.

If you know there will be only one matching element then use this:

$$('[name="tb_website static"]').first().value

If there are more than one input (which is valid HTML) then this gets an array of values:

$$('[name="tb_website static"]').map(Form.Element.getValue)

(By mapping through Form.Element.getValue - aliased as $F - it better handles browser differences and non-input elements that don't store their value in a value attribute)

I'm pretty sure that $('tb_website static') will be looking for an element with that ID not that NAME.

Have another look at the PrototypeJS Documentation.

That because $() function is an alias for getElementById(). Which means you need to give and id in your input :)

<input type="text" value="myValue" id="td_website static" name="td_website static" class="td_inner_input">