asked on 3/29/2004

Simple Javascript validation

How do I code javascript, that can validate whether the visitor fills in the regsistration number and if he does, then it should be 7 digits in length. My current code is as follows, but it doesn't work.

if (theForm.regNo.value == "" && theForm.regNo.value.length < 7)
{
alert("Please enter your valid Registration Number.");
theForm.regNo.focus();
return (false);
}

JavaScript

Last Comment

Zvonko

3/29/2004

ASKER CERTIFIED SOLUTION

Zvonko

3/29/2004

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zamorin

3/29/2004

ASKER

That is not accurate as it doesn't allow 'no registration number'. The proper one is as follows:

if (!theForm.regNo.value == "" && theForm.regNo.value.length < 7)
{
alert("Please enter your valid Registration Number.");
theForm.regNo.focus();
return (false);
}

Points for you. Thanks!

PS: Do you have any simple email validation script that checks for '@' and '.' in their email field?

Zvonko

3/29/2004

Let me first finish this:

if (theForm.regNo.value != "" && theForm.regNo.value.length != 7){
alert("Please enter your valid Registration Number.");
theForm.regNo.focus();
return (false);
}

Zvonko

3/29/2004

And for email check this:

if(!theForm.EmailAddress.value.match(/^\w+([\.\-]\w+)*\@\w+([\-\.]\w+)*\.[a-z]{2,4}$/i)){
alert("Wrong email: "+theForm.EmailAddress.value);
theForm.EmailAddress.select();
theForm.EmailAddress.focus();
return false;
}

zamorin

3/29/2004

ASKER

works fine, thanks again.

Zvonko

3/29/2004

You are welcome.