Js read configuration file to write from

Write their own with js to read the configuration file procedures
D: \ Useful Stuff \ Javascript \ mytest TXT
The file contents are as follows

 
[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"));