Hi,
You need to use GlideAjax to complete this requirement. Refer below scripts
Client script:
function onChange(control, oldValue, newValue, isLoading) {
if(newValue){
var ga = new GlideAjax('SvcCatalogCheckEndDate'); //Name of the Script Include
ga.addParam('sysparm_name', 'chkCatEndDate'); //Name of the function in the script include
ga.addParam('sysparm_date',g_form.getValue('start_date')); //Parameter to pass to the script include
ga.addParam('sysparm_endDate', g_form.getValue('end_date')); //Parameter to pass to the script include
ga.getXML(SvcCatalogCheckEndDateParse);
}
}
//Function that gets the response and will return to the client. You can place your alert in this function
function SvcCatalogCheckEndDateParse(response){
var answer = response.responseXML.documentElement.getAttribute("answer");
if(answer == 'true'){
return;
}
if(g_form.getValue('end_date') != '' && answer == 'false'){
alert(getMessage("The End Date cannot be a date that is before the Planned Start Date"));
g_form.setValue('end_date', '');
}
}
Script include: Should be client callable
var SvcCatalogCheckEndDate = Class.create();
SvcCatalogCheckEndDate.prototype = Object.extendsObject(AbstractAjaxProcessor, {
chkCatEndDate : function() {
var start = this.getParameter('sysparm_date'); //Passing the start date from the client
var end = this.getParameter('sysparm_endDate'); //Passing the end date from the client
var dif = gs.dateDiff(start, end, true); //Get the Different between dates.
if (dif <= 0){
return false;
}
else
{
return true;
}
}
});
