请看下下面错误如何改？谢谢。

我用jslint发现js中有如下错误，请看如何给改正？


Problem at line 13 character 38: Mixed spaces and tabs.

objXMLHttp = new XMLHttpRequest(); //针对FireFox，Mozillar，Opera，Safari，IE7，IE8

Problem at line 20 character 14: Move 'var' declarations to the top of the function.

for (var i = 0; i < activexName.length; i++) {

Problem at line 20 character 14: Stopping. (2% scanned).

Implied global: document 3, window 12, XMLHttpRequest 13

Unused variable: activexName 10 createXMLHttp

没看明白，你这个是一个错误然后跟上出错的源代码？