1 ACCEPTED SOLUTION
it worked see
Script Include:
var ValidationUtils = Class.create();
ValidationUtils.prototype = Object.extendsObject(AbstractAjaxProcessor, {
validateDate: function() {
var selected_date = new GlideDateTime(this.getParameter('sysparm_expectedDate'));
var requiredDate = new GlideDateTime(); // Todays Date
var businessDays = 7;
var daysAdded = 0;
while (daysAdded < businessDays) {
requiredDate.addDays(1); // Move to the next day
var dayOfWeek = requiredDate.getDayOfWeek(); // 1 = Sunday, 2 = Monday, ..., 7 = Saturday
if (dayOfWeek != 6 && dayOfWeek != 7) { // Exclude Friday (6) and Saturday (7)
daysAdded++;
}
}
var output = {};
if (selected_date.getDate() > requiredDate.getDate()) {
output.correctDateSelected = 'Yes';
} else {
output.correctDateSelected = 'No';
output.requiredDate = requiredDate.getDate().toString();
}
return JSON.stringify(output);
},
type: 'ValidationUtils'
}); 
Client Script:
function onChange(control, oldValue, newValue, isLoading) {
if (isLoading || newValue == '') {
return;
}
g_form.hideFieldMsg('my_datetime');
var validateSelectedDate = new GlideAjax('global.ValidationUtils');
validateSelectedDate.addParam('sysparm_name', 'validateDate');
validateSelectedDate.addParam('sysparm_expectedDate', g_form.getValue('my_datetime')); //Replace your date time variable
validateSelectedDate.getXMLAnswer(function getExpectedDate(answer) {
var validatedOutput = JSON.parse(answer);
if (validatedOutput.correctDateSelected == 'No') {
g_form.showFieldMsg('my_datetime', 'kindly select date after ' + validatedOutput.requiredDate.toString(), 'error');
}
});
//Type appropriate comment here, and begin script below
}
Output:
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