Input validation with JavaScript

In addition to native ColdFusion input validation using the validate attribute of the cfinput and cftextinput tags, the following tags support the onvalidate attribute, which lets you specify a JavaScript function to handle your cfform input validation:

• cfgrid
• cfinput
• cfslider
• cftextinput
• cftree

ColdFusion passes the following arguments to the JavaScript function you specify in the onvalidate attribute:

• The form object
• The JavaScript input object corresponding to the tag whose value is being validated
• The value of the control to validate

For example, if you code the cfinput tag as the following:

<cfinput type="text"
   ...
<!--- Do not include () in JavaScript function name --->
   onvalidate="handleValidation"
   ...
>

You define the JavaScript function as the following:

<script>
<!--
function handleValidation(form_object, input_object, object_value) {
...
}
//-->
</script>

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