js 数组排序

<script language="javascript">
var nameArr = new Array("d","c","b","a");
var idArr = new Array("4","3","2","1");


var newarr=new Array();
//排序前的数组
for(var i=0;i<nameArr.length;i++){
newarr[i]=new Array(nameArr[i],idArr[i]);
document.write(newarr[i]+"<br>");
}
function sortfunction(x,y)
{
return x[0].charCodeAt(0) - y[0].charCodeAt(0);//根据二维数组的第三列的第一个字母的ASCII码来降序排序
}
newarr.sort(sortfunction);
//排序后的数组
for(var i=0;i<nameArr.length;i++){

document.write(newarr[i]+"打印"+"q:"+newarr[i][0]+" h:"+newarr[i][1]+"<br>");
}

function paixu(){
for(var i=0;i<newarr.length;i++){
var oOption1 = document.createElement("OPTION");
oOption1.text=newarr[i][0];
oOption1.value=newarr[i][1];

alert("id"+oOption1.value);
innernewForm.notSelFunc.add(oOption1);
}
}

</script>
<form name="innernewForm">
<select name="notSelFunc" size="5" multiple style="width:100px">
</select><input type="button" onclick="paixu()" value="paixu">
</form>