Find difference between two dates in minutes

[sonita]

I have two fields ( Glide date time) , called outage stat and outage end.

i have another field called Total Outage (in minutes).   This should be auto calculated based off the Outage Start and Outage End fields.

This is what I've done so far ; but doesn't work.

As this a n onchange client script, which field should i select as the change field?( start   I guess?)

function onChange(control, oldValue, newValue, isLoading, isTemplate) {

    if (isLoading || newValue == '') {

          return;

    }

  var strt = g_form.getValue('u_outage_start');

  var end = g_form.getValue('u_outage_end');

  var ajax = new GlideAjax('AjaxDurCalc');

  ajax.addParam('sysparm_name','durCalc');

  ajax.addParam('sysparm_strt',strt);

  ajax.addParam('sysparm_end',end);

  ajax.getXMLWait();

  var answer = ajax.getAnswer();

  g_form.setValue('u_total_outage_in_minutes', answer);

}

[Goran WitchDoc]

How does the script include look like? What happens if you put the answer in a alert. what value are you getting back?

[sonita]

this is the script include

var AjaxDurCalc = Class.create();

AjaxDurCalc.prototype = Object.extendsObject(AbstractAjaxProcessor, {

durCalc: function() {

  return gs.dateDiff(this.getParameter('sysparm_strt'),this.getParameter('sysparm_end'), false);

}

});

[sonita]

The alert brings null

I'm not sure which field i should set as the change field

[Goran WitchDoc]

Client script:

function onChange(control, oldValue, newValue, isLoading, isTemplate) {

    if (isLoading || newValue === '') {

          return;

    }

  var strt = g_form.getValue('start_date');

  var end = g_form.getValue('end_date');

  var ajax = new GlideAjax('counttime');

  ajax.addParam('sysparm_name','calcutime');

  ajax.addParam('sysparm_strt',strt);

  ajax.addParam('sysparm_end',end);

  ajax.getXMLWait();

  g_form.setValue('u_total_outage_in_minutes', answer);

}

Script include:

var counttime = Class.create();

counttime.prototype = Object.extendsObject(AbstractAjaxProcessor, {

  calcutime: function() {

  var start= this.getParameter('sysparm_strt');

  var end = this.getParameter('sysparm_end');

  result = gs.dateDiff(start, end, true);

  result = result/60;//Reslut in seconds, so divided with 60 to get minutes

  return result;

  },

      type: 'counttime'

});