Form Validation in Netscape 6

[Boblevien]

I'm trying to check that a form field has been filled

In IE5 I use something like:
function isBlank(box) {
if(document.form1.elements[box].value=="&quot
{
alert("Sorry, this is a required field"
document.form1.elements[box].focus();
return false;
}
}

I thought that the following would work in both IE5 and NS6


function validlogin() {
If(document.getElementById("emailAddr&quot.value=="&quot
{
alert("No email"
return false;
}
}

But it doesn't! Any ideas?

Bob.