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form validation

I am trying to verify a set of fields in a form, but I am having trouble. I'm new to web development and everything I've tried has not worked. Any suggestions would be appreciated.

[HTML]<html>
<head>
<script language="JavaScript">

function verifyForm()
{
alert("1");

function isInteger()
{
var v_ssn = document.getElementById('id_ssn');
alert("2");
var i;
for (i = 0; i < v_ssn.length; i++)
{
// Check that current character is number.
var c = v_ssn.charAt(i);
if (((c < "0") || (c > "9")))
return false;
}
// All characters are numbers.
return true;
}
isInteger(s);

function verify_ssn()
{
var v_ssn = document.getElementById('id_ssn');
alert(v_ssn);
alert(v_ssn.length);
if(V_ssn.length != 11)
{
alert("Bad ssn length");
return -1
}

alert(v_ssn.charAt(3));
alert(v_ssn.charAt(6));

if(v_ssn.charAt(3) != '-' || id_ssn.charAt(6) != '-')
{
alert("Expected hyphen");
return -2
}


var i;
for (i = 0; i < v_ssn.length; i++)
{
if(i!=3 && i!=6)
{
if(isInteger(v_ssn.charAt(i)) == false)
{
alert("Expected digit 0 - 9");
return -3
}
}
}

return 1
}
verify_ssn();
}


</script>
</head>

<body>

<div id="id_form"
<div id="id_fname" class="my_black">First name</div>
<input name="name" type="text" size="25"/>
<div id="id_ssn" class="my_black">SSN</div>
<input name="SSN" type="text" size="9"/>
<div id="id_phone" class="my_black">Phone</div>
<input name="Phone" type="text" size="9"/>

<hr>
<input type="button" onclick="verifyForm()">

</div>
</body>
</html>[/HTML]
Oct 28 '07 #1
1 914
acoder
16,027 Expert Mod 8TB
The first step would be to put your input tags within form tags.

Give your input text fields ids so that you can easily access them.
Oct 29 '07 #2

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