function setActive() {

	var tgts = ["nav_home","nav"];
	var tgt;
	if(document.getElementById(tgts[0])) {
		tgt = tgts[0];
	}else if(document.getElementById(tgts[1])) {
		tgt = tgts[1];
	}	
	
   aObj = document.getElementById(tgt).getElementsByTagName('a');
   bObj = document.getElementById(tgt).getElementsByTagName('li');
   for(i=0;i<aObj.length;i++) { 
     if(document.location.href.indexOf(aObj[i].href)>=0) {
       bObj[i].className='current';
	 }
   }
}
window.onload = setActive;