首先你将数组定义成全局的:
<script language=javascript>
var a = new Array();
function A(){
a[0] = "aaa";
}
function B(){
alert(a[0]);
}A();
B();</script>
<script language=javascript>
var a = new Array();
function A(){
a[0] = "aaa";
}
function B(){
alert(a[0]);
}A();
B();</script>
也没有报错