Select Box Validation

[Brian Kramer]

I am having issues with making sure users select an option from a select
box... here is my code

function checkit(){
if (document.postd ata.phonenumber == ""){
alert("Please enter a Phone Number");
return false;}
if (document.postd ata.request[document.postda ta.request.sele ctedIndex].value
== ""){
alert("Please Select a Request");
return false;}
}




<form name=postdata action=?action= add method=post onsubmit='retur n
checkit()'>
<input type=text name=phonenumbe r>
<select name=request>
<option value=1>Send manual</option>
<option value=2>Duplica te Product</option>
<option value=3>Did not order</option>
</select>
<input type=submit>
</form>

can someone help me figure this out. I believe it is because
document.postda ta.request is undefined until an option is chosen but I don't
know how to fix that.

[Dave Vick]

Re: Select Box Validation

Brian

Check for a selectedIndex value of -1. If no item is selected in a
Select object then:
document.formNa me.selectObject Name.selectedIn dex
will return -1.

Hope that helps

[Lee]

Re: Select Box Validation

Brian Kramer said:[color=blue]
>
>I am having issues with making sure users select an option from a select
>box... here is my code
>
>function checkit(){
>if (document.postd ata.phonenumber == ""){
>alert("Pleas e enter a Phone Number");
>return false;}
>if (document.postd ata.request[document.postda ta.request.sele ctedIndex].value
>== ""){
>alert("Pleas e Select a Request");
>return false;}
>}
>[/color]
[color=blue]
>can someone help me figure this out. I believe it is because
>document.postd ata.request is undefined until an option is chosen but I don't
>know how to fix that.[/color]

No, the problem is that the value of selectedIndex is -1 until an option
is chosen. and document.postda ta.request[-1].value is undefined.
That should be all you need to know to fix it.