// JavaScript Document
function ltrim( source ){
     var index = 0;
     while( source.charAt(index) == " " ) index++;
     return source.substr(index);
 }

 function rtrim( source ){
     var index = source.length - 1;
     while( source.charAt(index) == " " ) index--;
     return source.substring(0, index + 1);
 }

 function trim( source ){
     return ltrim(rtrim(source));
 }