function setdefaultarea(prov, city,county) {
	var provSelect = document.getElementById('province');
	
	if (provSelect) {
		for (var i = 0; i < provSelect.options.length; i++) {
			if (provSelect.options[i].value == prov) {
				provSelect.options[i].selected = true;
				change(1);
				break;
			}
		}
		
		var citySelect = document.getElementById('city');
		
		if (citySelect) {
			for (var i = 0; i < citySelect.options.length; i++) {
				if (citySelect.options[i].value == city) {
					citySelect.options[i].selected = true;
					change(2);
					break;
				}
			}
		}
		
		if (county) {
			var counSelect = document.getElementById('county');
			
			if (counSelect) {
				for (var i = 0; i < counSelect.options.length; i++) {
					if (counSelect.options[i].value == county) {
						counSelect.options[i].selected = true;
						break;
					}
				}
			}			
		}
	}
}