Here is a file which exhibits the error - just click on the button - change Form to Form1 in 2 places and it no longer breaks:
<html>
<head>
<script type="text/javascript">
<!--
var Form = {
getElements: function(form) {
form = $(form);
var elements = new Array();
for (tagName in Form.Element.Serializers) {
var tagElements = form.getElementsByTagName(tagName);
for (var j = 0; j < tagElements.length; j++)
elements.push(tagElements[j]);
}
return elements;
}
}
function validate() {
currentForm = document.getElementById('formId');
currentForm.field1.value="fred";
return false;
}
// -->
</script>
</head>
<body>
<form id='formId' name='formName'>
<input type="text" name="field1" value="barney">
<input type="button" type="submit" id="submit" onClick="validate()">
</form>
</body>
</html>
If it helps, here is a WebTest script for clicking the link:
<target name="main">
<property name="testfile" location="checkJavaScript.html"/>
<webtest name="prototype.js bug">
<config
summary="true"
saveresponse="true"
showhtmlparseroutput="false"/>
<steps>
<invoke url="file:///${testfile}"/>
<clickButton htmlId="submit" />
<verifyInputField name="field1" value="fred"/>
</steps>
</webtest>
</target>
