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MACROMEDIA COLDFUSION 5-DEVELOPING Develop Manual page 165

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Input Validation with JavaScript

To use JavaScript to validate form data:

1

2

3

4

Create a new file in ColdFusion Studio.

Edit the page so that it appears as follows:

<html>

<head>

<title>JavaScript Validation</title>

<script>

<!--

function testbox(form) {

Ctrl = form.inputbox1;

if (Ctrl.value == "" || Ctrl.value.indexOf ('@', 1) == -1 ||

Ctrl.value.indexOf ('.', 3) == -1)

{

return (false);

}

else

{

return (true);

}

}

//-->

</script>

</head>

<body>

<h2>JavaScript validation test</h2>

<p>Please enter your email address:</p>

<cfform name="UpdateForm" preservedata="Yes"

action="validjs.cfm" >

<cfinput type="text"

name="inputbox1"

required="YES"

onvalidate="testbox"

message="Sorry, your entry is not a valid email address."

size="15"

maxlength="30">

<input type="Submit" value=" Update... ">

</cfform>

</body>

</html>

Save the page as

validjs.cfm

View

in your browser.

validjs.cfm

.

145

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