function ShowLeftMenu(){
 var url = ''+document.location;
 var res = url.match(/production\/(.*)\.html/gi), res2 = url.match(/p5\/l(.*)\.html/gi);
 if(!res && !res2) return;
 
 var tag = document.getElementsByTagName('a');
 for(var i=0,b=tag.length; i<b; i++){
  if(tag[i].href.indexOf(res) == -1 && tag[i].href.indexOf(res2) == -1) continue;
  
  tag[i].className = 'active';
 } //for i
 
}  //function ShowLeftMenu

function Go(url){
 document.location = url;
} //function Go

ShowLeftMenu();