How to call JavaScript function?

[dmorand]

I want to call a javascript function if my cfif logic is True. How do I call the javascript function? I just want to have a popup alert saying that the choice already exists, and then send the user back to the main page.

[code=cfm]
<cfif isDefined("Form .Add")>
<cfquery name="validateN ame" datasource="Sec urity_Access" dbtype="ODBC">
select sysID from tblSystem
where name='#Form.nam e#'
</cfquery>
<cfif "validateName.R ecordCount" eq 1>
<cfoutput>sysEx ists(#Form.name #)</cfoutput>
<cflocation URL="system.cfm ">
<cfelse>
<cfquery name="insertSys tem" datasource="Sec urity_Access" dbtype="ODBC">
insert into tblSystem (name,descripti on,updDateTime)
values ('#name#','#des cription#','#Da teTime#')
</cfquery>
</cfif>
</cfif>
[/code]

[acoder]

Just add the code within script tags as you would in an HTML page:

[HTML]<script type="text/javascript">
// JS code ..
</script>[/HTML]

[John Manoah]

JavaScript will be executed at the client side after the page is parsed by ColdFusion at the server side such that a code such as below is perfectly valid:

<script>
alert('#variables.intInteger#');
</script>

When JavaScript reaches this line of code, the CF part would've already been replaced by the value it is assigned to.

In your case you could simply write the JS piece along with the CF code.

[Ajo Koshy Josep]

In the cfif logic where u want to get the alert and needs to re-direct, code like this

<cfif ... 

<script type="text/javascript">
alert("choice already exists");
</script>

<cflocation URL="system.cfm">

<cfelse>

<!------codes------>

</cfif>