Unsupported property of method error

programmher · Feb 24, 2003

I am attempting to validate and substitute data for a phone number. If the user attempts to enter an area code other than the valid one, I need to change it. Here is my code:

<script>
function validate_PhoneNum(){
if (document.MyForm.PhoneNum.charAt(3)== "000&quot

alert("strip 000 and use 123 instead&quot

return true
}
</script>

<form action="Myform.cfm" name="MyForm" id="MyForm" enablecab="Yes" onsubmit="return validate_PhoneNum(this.PhoneNum.value);"><input type="text" name="PhoneNum" value="">
</form>

I keep getting "object doesn't support this property or method" error message. Why?

Second, what is the best method to change the "000" to "123"?

onpnt · Feb 24, 2003

your passing a parameter but not receiving a parameter in the function
function validate_PhoneNum(){
_________________________________________________________
for the best results to your questions: FAQ333-2924
Is your question a most FAQ?? Find out here FAQ333-3048

onpnt · Feb 24, 2003

try this
I used the slice function to get the value of position 0 to 3 (area code) although you may want to validate that not having a space as in " 123"

<html>
<head>
<script>
function validate_PhoneNum(str){
alert(str);
var newStr = str.slice(0,3)
if (newStr == "000&quot

{
alert("strip 000 and use 123 instead&quot

return false;
} else {
return true
}
}
</script>
</head>
<body>
<form action="Myform.cfm" name="MyForm" id="MyForm" enablecab="Yes" onsubmit="return validate_PhoneNum(this.PhoneNum.value);">
<input type="text" name="PhoneNum" value="">
<input type="submit" value="submit">
</form>
</body> _________________________________________________________
for the best results to your questions: FAQ333-2924
Is your question a most FAQ?? Find out here FAQ333-3048

onpnt · Feb 24, 2003

on eother thing you could do if you want. the charAt function only returns the character at that position you refernce. so in your case you said 3 and if that character at position 3 was a then thats all you get.
so in order to do that with the charAt you need to due
charAt(0)
charAt(1)
charAt(2)

see how that would not be efficient _________________________________________________________
for the best results to your questions: FAQ333-2924
Is your question a most FAQ?? Find out here FAQ333-3048

programmher · Feb 24, 2003

oh-ho-ho!!!

Now I see!!! Many thanks to all the responses!!!

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Unsupported property of method error

programmher

Programmer

onpnt

Programmer

onpnt

Programmer

onpnt

Programmer

programmher

Programmer

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