var queue = ["red","green","yellow","purple"];
        queue.splice(1, 2 , "white,black,blue");
        alert(queue.sort().toString()); //output  "purple,red,white,black,blue"，这里输出为啥不是按首字母排列？

[ 本帖最后由 devilqin 于 2012-6-13 16:21 编辑 ]

按照 ASCII 字符顺序进行升序排列

<script>
var queue = ["red","white","black","blue","green","yellow","purple"];
//queue.splice(1, 2 , "white,black,blue");
alert(queue.sort().toString()); //output  "black,blue,green,purple,red,white,yellow"
</script>

因为的的splice的第三个参数错了，
你那样的写法是将"white,black,blue"看成一个整体，
如果写成这样：
queue.splice(1, 2 , "white","black","blue");
就不会发生排序错误了；
 var queue = ["red","green","yellow","purple"];
 queue.splice(1, 2 , "white","black","blue");
 alert(queue.sort().toString());
//black,blue,purple,red,white