<script type="text/javascript">    var a = new Array();    a = "a";    a = "b";    a = "c";    a = "d";//    alert(a[0])    for(var i=0; i<a.length; i++){        console.log(i + " " + a[i]);    }</script>

<?php    $Cities[] = "<B>北京</B>";    //等同于$Cities[0] = "北京"    $Cities[] = "<B>天津</B>";    //等同于$Cities[1] = "天津"    $Cities[] = "<B>上海</B>";    //等同于$Cities[2] = "上海"    $Cities[] = "<B>深圳</B>";    //等同于$Cities[3] = "深圳"    /*     ** 统计元素个数     */    $indexLimit = count($Cities);    //把数组中元素的个数赋给$indexLimit    /*     ** 打印所有数组     */    for($index=0; $index < $indexLimit; $index++)    {        print("第 $index 个城市是 $Cities[$index]。 <BR>\n");    }?>