js reads configuration file self-writing_javascript skills

[plugin_page_search]
wholeword=0
matchcase=1
hightlight=1
total=1

[data]
up=85
down=5

var fso = new ActiveXObject("Scripting.FileSystemObject");
var f = fso.OpenTextFile("D:\Useful Stuff\Javascript\mytest.txt",1);
var s = "";
while (!f.AtEndOfStream)
{
s = f.ReadLine();
}
f.Close();

function getINI(item,key)
{
new RegExp("\[" item "\](. )").exec(s);
var str=RegExp.$1;
var reg2=/(w )=(d )/;
var keyValue={};
str.replace(reg2,function(a,b,c){
keyValue[b]=c ;
});
return keyValue[key];
}
alert(getINI("data","up"));
alert(getINI("plugin_page_search","hightlight "));