CODE EXAMPLE FOR JAVASCRIPT

Glide Ajax Client Script ServiceNow

function onChange(control, oldValue, newValue, isLoading) {
	if (isLoading) {
		return;
	}
 
	var ga = new GlideAjax('serverCheck');
	ga.addParam('sysparm_name', 'serverFunctionName'); //sysparm_name is reserved for the name of the script include function to call
	ga.addParam('sysparm_group', g_form.getValue('assignment_group'));
	ga.addParam('sysparm_other_variable', g_form.getValue('short_description')); //Any variable can be sent
	ga.getXML(clientCallback); //Use getXML rather than getXMLWait. Input is your callback function
}
 
function clientCallback(response) {
	var answer = response.responseXML.documentElement.getAttribute("answer"); //Get answer from server
	//Do something with answer
	g_form.setValue('short_description', answer);
}