jscript, Checking for input field

Raymond D'Anjo
#1 / 4

Checking for input field

I have (or not) this input field in my ASP page:
<INPUT type="text" size=10 maxlength=10 id=txtTransAmount
name=txtTransAmount>

If it doesn't exist and I try to validate it the page fails.
How can I check for the existence if this field in javascript before
validating it?

Mon, 13 Sep 2004 00:16:47 GMT

etan
#2 / 4

Checking for input field

"Raymond D'Anjou"

Quote:

> I have (or not) this input field in my ASP page:
> <INPUT type="text" size=10 maxlength=10 id=txtTransAmount
> name=txtTransAmount>

> If it doesn't exist and I try to validate it the page fails.
> How can I check for the existence if this field in javascript before
> validating it?

if I understand the problem correctly you are trying to use server-side
JavaScript to validate the input field through asp

so your code probably looks something like this ...

<%
...
if(Request.Form("txtTransAmount") == "test") return;
%>

to test for the existence of a form field in asp-jscript do something like
this ...
<%
...
if(Request.Form("txtTransAmount").Count == 0)
{
// no input elements by that name exist
return;
}
else
{
// use Request.Form("txtTransAmount")
}
%>

Mon, 13 Sep 2004 00:29:25 GMT

Gerald de Buege
#3 / 4

Checking for input field

For client side:

function exists(thisID){
return (document.getElementById(thisID))?true:false;

Quote:

}

Gerald

Quote:

> I have (or not) this input field in my ASP page:
> <INPUT type="text" size=10 maxlength=10 id=txtTransAmount
> name=txtTransAmount>

> If it doesn't exist and I try to validate it the page fails.
> How can I check for the existence if this field in javascript before
> validating it?

Wed, 22 Sep 2004 05:24:15 GMT

Raymond D'Anjo
#4 / 4

Checking for input field

Thanks.

Quote:

> For client side:

> function exists(thisID){
> return (document.getElementById(thisID))?true:false;
> }

> Gerald

> > I have (or not) this input field in my ASP page:
> > <INPUT type="text" size=10 maxlength=10 id=txtTransAmount
> > name=txtTransAmount>

> > If it doesn't exist and I try to validate it the page fails.
> > How can I check for the existence if this field in javascript before
> > validating it?

Fri, 24 Sep 2004 20:11:52 GMT