if(Dd('property_required') != null) {
	var ptrs = Dd('property_required').getElementsByTagName('option');
	for(var i = 0; i < ptrs.length; i++) {		
		f = 'property-'+ptrs[i].value;
		var t = $('#'+f).attr('tagName').toLowerCase();
		if(t == 'span') {
			j = checked_count(f);
			if(j == 0) {
				Dmsg('请选择'+ptrs[i].innerHTML, f, 1);
				return false;
			}
		} else if(t == 'select') {
			if(Dd(f).value == '') {
				Dmsg('请选择'+ptrs[i].innerHTML, f);
				return false;
			}
		} else {
			if(Dd(f).value.length < 1) {
				Dmsg('请填写'+ptrs[i].innerHTML, f);
				return false;
			}
		}
	}
}