// JavaScript Document
var arr_subtype = {};
function selType() {
	var form = document.forms[0];
	empty_list(form.ai_subtype, 1);

	if (form.ai_type.value == 1) {
    	insert_list(form.ai_subtype, 7, 'Highrise Office Building');
        insert_list(form.ai_subtype, 13, 'Lowrise Office Building');
        insert_list(form.ai_subtype, 4, 'Midrise Office Building');
	} else if (form.ai_type.value == 2) {
        insert_list(form.ai_subtype, 8, 'Flex Space');
        insert_list(form.ai_subtype, 9, 'Manufacturing');
        insert_list(form.ai_subtype, 12, 'Office Showroom');
        insert_list(form.ai_subtype, 11, 'Research and Development');
        insert_list(form.ai_subtype, 5, 'Warehouse');
	} else if (form.ai_type.value == 3) {
        insert_list(form.ai_subtype, 1, 'Community Shopping Center');
        insert_list(form.ai_subtype, 2, 'Fashion/Specialty Center');
        insert_list(form.ai_subtype, 3, 'Neighborhood Shopping Ctr');
        insert_list(form.ai_subtype, 10, 'Regional Shopping Center');
        insert_list(form.ai_subtype, 6, 'Retail Power Center');	
	} else {
    	insert_list(form.ai_subtype, 7, 'Highrise Office Building');
        insert_list(form.ai_subtype, 13, 'Lowrise Office Building');
        insert_list(form.ai_subtype, 4, 'Midrise Office Building');
        insert_list(form.ai_subtype, 8, 'Flex Space');
        insert_list(form.ai_subtype, 9, 'Manufacturing');
        insert_list(form.ai_subtype, 12, 'Office Showroom');
        insert_list(form.ai_subtype, 11, 'Research and Development');
        insert_list(form.ai_subtype, 5, 'Warehouse');
        insert_list(form.ai_subtype, 1, 'Community Shopping Center');
        insert_list(form.ai_subtype, 2, 'Fashion/Specialty Center');
        insert_list(form.ai_subtype, 3, 'Neighborhood Shopping Ctr');
        insert_list(form.ai_subtype, 10, 'Regional Shopping Center');
        insert_list(form.ai_subtype, 6, 'Retail Power Center');	
	}
}
function empty_list(sList, sIndex) {                   // remove all the item after sIndex
	for (var i=sList.length-1; i>=sIndex; i--) {
		sList.remove(i);
	}
}
function insert_list(sList, sValue, sText) {
	var NewItem = document.createElement('option');
	NewItem.text = sText;
	NewItem.value = sValue;
	try {       // standards compliant; doesn't work in IE
		sList.add(NewItem, null);   // append
	}
	catch(ex) { // IE only
		sList.add(NewItem);
	}
}