Hi Mark,

Find the script below,

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
if (isLoading || newValue === '') {
return;
}

//Type appropriate comment here, and begin script below
var change = g_form.getValue('u_change_type');
//if(newValue != '')
if(newValue == 'major'||'minor');

{
var ga = new GlideAjax('ConfirmDate');
ga.addParam('sysparm_name', 'chkCurrDate');
ga.addParam('sysparm_date',g_form.getValue('start_date'));
ga.getXML(NewParse);
}
function NewParse(response){
var answer = response.responseXML.documentElement.getAttribute("answer");
if(answer == 'false'){
g_form.showFieldMsg("start_date","Selected Date is in past, Select a valid date","error",true);
g_form.setValue('start_date', '');
g_form.setValue('end_date','');// Setting the variable as empty
}
}
}