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                       An iEntry.com Mailing
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      TheDevWeb - Getting The Value Of AJAX-ified Controls 
                          June 20, 2007
                     http://www.thedevweb.com

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Getting The Value Of AJAX-ified Controls  
Raymond Camden | Expert Author

I ran into a problem last night trying to use JavaScript to read the
value of a rich text field.

I had assumed I could use the normal syntax I'd use for a form field:

document.forms[0].body.value

or

document.getElementById('body')

But neither of these worked correctly.

Turns out the JavaScript API provided in ColdFusion 8 has an API
for this:

ColdFusion.getElementValue(elementId, formID, attributeName).

The formID and attributeName values are optional.

Here is a simple example: 

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<script>
function test() {
   var body = ColdFusion.getElementValue('body');
   alert(body);
   return false;
}
</script>

<cfform onSubmit="return test()">
<cftextarea richtext="true" name="body" />
<input type="submit">
</cfform>

In case you are curious - the value includes all the HTML from the
rich text value as you would probably expect.

The API can also be used on grids and trees.

For grids, you have to provide the column name, and for trees you
ask for either the node or the path value.

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About the Author:
Raymond Camden, ray@camdenfamily.com
http://ray.camdenfamily.com

Raymond Camden is Vice President of Technology for roundpeg, Inc.
A long time ColdFusion user, Raymond has worked on numerous
ColdFusion books and is the creator of many of the most popular
ColdFusion community web sites. He is an Adobe Community Expert,
user group manager, and the proud father of three little bundles
of joy. 

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