各位高手，帮忙写一个排序函数，谢谢！

Question

<script>
content1 = new Array();
content1[0]  = new Array("01","aaaaa","46","1");
content1[1]  = new Array("02","bbbbb","8","1");
content1[2]  = new Array("03","ccccc","10","1");
content1[3]  = new Array("04","ddddd","11","2");
content1[4]  = new Array("05","eeeee","15","2");
content1[5]  = new Array("06","fffff","17","1");
content1[6]  = new Array("07","ggggg","20","3");
content1[7]  = new Array("08","hhhhh","32","3");
content1[8]  = new Array("09","iiiii","41","2");
content1[9]  = new Array("10","jjjjj","2","1");function sort_asc(a,b) {
  return (a[3]-b[3]);
}
function sort_des(a,b) {
  return (b[2]-a[2]);
}
document.write("<br>按3升序<br>");
ar = content1.sort(sort_asc);
for(v in ar)
  document.write(ar[v]+"<br>");
document.write("<br>按2降序<br>");
ar = content1.sort(sort_des);
for(v in ar)
  document.write(ar[v]+"<br>");
document.write("<br>按2降序按3升序<br>");
ar = content1.sort(sort_des);
ar = ar.sort(sort_asc);
for(v in ar)
  document.write(ar[v]+"<br>");</script>