return b-a;//这里写成b-a,与-1，有什么区别吗?
<script type="text/javascript">
function sortNum(a,b) {
return b-a;//这里写成b-a,与-1，有什么区别吗?
}
var myarr = new Array("80","16","50","6","100","1");
document.write(myarr.sort(sortNum));
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<script type="text/javascript">
function sortNum(a,b) {
return b-a;//这里写成b-a,与-1，有什么区别吗?
}
var myarr = new Array("80","16","50","6","100","1");
document.write(myarr.sort(sortNum));
2017-10-02
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