var addStartValue;
addStartValue = 0;
function AddUsage(NewUsage){
	// remove existing list
	for (var i= objUsage.length; i > 0 ; i--){
  		objUsage.remove(i);
	}
	for (var i=0; i < NewUsage.length;i++) {
		objUsage.options.add(document.createElement('OPTION'));
    	objUsage.options[i + addStartValue].text = NewUsage[i];
    	objUsage.options[i + addStartValue].value = NewUsage[i];
     }
}
function Usage() {
	var UsageList = new Array();
UsageList[0] = '住宅';
UsageList[1] = '寫字樓/工貿';
UsageList[2] = '工業  ';
UsageList[3] = '舖位   ';
UsageList[4] = '車位 ';
UsageList[5] = '地皮';

	AddUsage(UsageList);
	UsageList = null;
}