-Matthew-
asked on
Form validation - Javascript
My script works part of the time and I don't know why, is there a better way I should be doing this.
<script type="text/javascript" language="javascript">
function validateForm()
{
var x=document.forms["form1"]["ssn"].value
var y=document.forms["form1"]["NO_ssn"].value
if (x=="" && y=="")
{
alert("You must type in the last four digits of your Social Security or click the 'No Social Security Number' check box.");
return false;
}
}
</script>
<form action="somewhere" method="POST" name="form1" id="form1" onsubmit="return validateForm();" >
<input name="NO_ssn" type="checkbox" id="NO_ssn" value="N/A" />
<input name="ssn" type="text" id="ssn" value="" size="4" maxlength="4" />
</form>
Dave Baldwin
Maybe you're looking at the wrong property: http://www.w3schools.com/jsref/prop_checkbox_checked.asp
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
<script type="text/javascript" language="javascript">
function validateForm() {
var x=document.forms["form1"]["ssn"].value;
var y=document.forms["form1"]["NO_ssn"].checked;
alert('x='+x);
alert('y='+y);
if (x=='' && y==false) {
//user did NOT indicate no SSN and left SSN blank
alert("You must type in the last four digits of your Social Security or click the 'No Social Security Number' check box.");
return false;
} else if (!(x=='') && y==true) {
//user indicated no SSN but gave one anyway
alert("You entered the last four digits of your Social Security but clicked the 'No Social Security Number' check box.");
return false;
} else if (isNaN(x) && y==false) {
//user provided an SSN, but it is not a number
alert("SSNs can only be numbers");
return false;
} else {
alert('SSN op-out=' + y + '\n' + 'SSN provided=' + x);
return true;
}
}
</script>
<form action="somewhere" method="POST" name="form1" id="form1" onsubmit="return validateForm();" >
No Social Security Number: <input name="NO_ssn" type="checkbox" id="NO_ssn" value="N/A" /><br/>
My last 4 of SSN: <input name="ssn" type="text" id="ssn" value="" size="4" maxlength="4" /><br/>
<input type="submit" value="submit">
</form>