character limit on single line field

[sarahkapasi]

We have a Service Catalog Item with a single line field variable which has character limit to 40 characters.

I would like to make it so the user can't 'Order Now' until 40 characters are in that field.

Thank you,

Sarah

[Deepak Kumar5]

var textBox = g_form.getValue("field_name");


var textLength = textBox.value.length;
if(textLength <40)
{
   alert("Please enter full field");
}

[sarahkapasi]

Thanks Deep!   where should I put the above script?

[Deepak Kumar5]

You can write it in onChange or OnSubmit Client script.

[sarahkapasi]

I tried the following, but I didn't get a pop-up message