Want to put character limit on a variable on a catalog item

[Charles Hong]

Hi - i have a variable on a catalog item that is a singe line text field. 

I want to do a onSubmit catalog client script so that users can't put more than 15 characters in the field. I have attempted w/ the script below and am unable to have it work successfully. If someone could please correct my script. 

function onSubmit() {

var length = 15;
var name = g_form.getValue('hostname'); 

               
 if(name.length > length)
                             alert('Please ensure the hostname is not more than 15 characters') ;          

   }

[PS930585]

Try this one.

var hostName = g_form.getValue("u_host_ip");

    hostName = hostName.split('');

    var len = hostName.length;

    alert(len);

    if (len > 15) {

        g_form.showFieldMsg('u_host_ip', "Enter less than 15 characters", 'error');

        g_form.setValue('u_host_ip', hostName.substring(0, 15));

    }

    else{

        g_form.hideFieldMsg('u_host_ip');

    }