}
</script>
结果：
1
2
4
5
12
23
23
34
Demo5（Demo3的第三种写法）：
<script>
function compare(a,b) {
return a-b;
}
var numArr = new Array(12,23,1,4,23,34,2,5);
numArr.sort(compare);
for (var i = 0; i<numArr.length; i++) {
document.write(numArr[i] +"<br>");
}
</script>
结果：
1
2
4
5
12
23
23
34
Demo6（Demo3的第四种写法）：
<script>
var compare = function(a,b) {
return a-b;
}
var numArr = new Array(12,23,1,4,23,34,2,5);
numArr.sort(compare);
for (var i = 0; i<numArr.length; i++) {
document.write(numArr[i] +"<br>");
}
</script>
结果：
1
2
4
5
12
23
23
34
