<script type="text/javascript">
        var str = "How are you doing today";
        var strAry = new Array;
        strAry = str.split(" ");  
        alert(strAry);
</script>

------解决方案--------------------

JScript code

<script>
        var s = "how are you";
        var vs = s.split(" ");
        for(var i = 0; i < vs.length; i++){
            alert(vs[i]);
        }
    </script>