cities.js

功能齐全

		if (aRemain==null)

			aRemain = 1;

		chgItem(aSrc.options[aSrc.selectedIndex].value, aDes, aClass, aRemain);

	}

}

function chgItem(aValue, aDes, aClass, aRemain){

	if (chgItem.arguments.length<3)

		alert("参数传入错误！")

	else if (aClass==null)

		alert("错误！aClass没有定义！")

	else{

		if (aRemain==null)

			aRemain = 1;

		deleteAllItem(aDes, aRemain);

		for (var i=0; i<aClass.length; i++)