使用 for ... in 循环遍历数组

beyes

可以用 for ... in 循环遍历数组中的每个元素，测试代码如下：
[code=javascript]<script type="text/javascript">
var WebSite = new Array();

WebSite["first"] = "www";
WebSite["second"] = "sina";
WebSite["third"] = "com";
WebSite["fourth"] = "cn";

var indexKey;

for (indexKey in WebSite) {
    document.write( "indexKey is " + indexKey + "<br>" );
    document.write( "item value is " + WebSite[indexKey] + "<br><br>" );
    }
</script>[/mw_shl_code]
运行输出：

indexKey is first
item value is www

indexKey is second
item value is sina

indexKey is third
item value is com

indexKey is fourth
item value is cn