optionSetChanged = function () {
var optionsetControl = Xrm.Page.ui.controls.get("new_places");
var options = optionsetControl.getAttribute().getOptions();

 var value = Xrm.Page.getAttribute("new_location").getValue();
// first option is selected
if (value == 1) {
    optionsetControl.clearOptions();
    for (var i = 0; i < options.length - 1; i++) {
        if (i == 0 || i == 1) {
            optionsetControl.addOption(options[i]);
        }
    }
}
// else is second option is selected
else if (value == 2) {
    optionsetControl.clearOptions();
    for (var i = 0; i < options.length - 1; i++) {
        if (i == 2 || i == 3 || i == 4) {
            optionsetControl.addOption(options[i]);
        }

    }
  }
}