Show alert onSubmit if field is not empty

[paul971]

How can I set an onSubmit client script alert to display if a field is not empty? I'm not finding anything relevant other than things for catalog items which gives an error.

[justin_drysdale]

function onSubmit() {
     //Type appropriate comment here, and begin script below
     var your_field = g_form.getValue('u_field_name');

     if (your_field == '') {
           alert('u_field_name is blank');
     }
}

[bernyalvarado]

Hi Paul,

You can navigate to Client Scripts, and create an onSubmit client script in there.

Thanks,

Berny

[bernyalvarado]

The following should be helpful:

http://wiki.servicenow.com/index.php?title=Client_Script_Best_Practices

http://wiki.servicenow.com/index.php?title=Client_Scripts#gsc.tab=0

Quote from the wiki:

3.2 onSubmit() Scripts  

An onSubmit() script runs when a form is submitted. Typically, you use an onSubmit() script to validate things on the form and ensure that the submission makes sense. As such, onSubmit() scripts can potentially cancel a submission by returning false. 
An onSubmit() script must contain a function named onSubmit(). 
For example, here is an onSubmit() script that prompts the user to confirm that a priority one ticket should really be submitted. If the user clicks Cancel in the confirmation dialog box, the submission is canceled. 

function onSubmit() { var priority = g_form.getValue('priority'); if (priority && priority == 1) return confirm('Are you sure you want to submit a priority one ticket? The CIO will be notified!');} }
The important thing to remember here is: to stop form submission, return false from your onSubmit() script. 

Thanks,

Berny

[prithvirajchaud]

HI,

Right click on the header -> configure -> client scripts -> new

From there choose onSubmit in the type field.

The code would be somewhat like this

function onSubmit(){

        if(g_form.getValue("<field_name>")){

                  alert("Your text here");

        }

}

Thanks