// menu
function show(num,btn,div,off,on,id,tag){
	        var btn=btn;
			var bt=bt;
			var div=div;
			var off=off;
			var on=on;
			var id=id;
			var tag=tag;
			var total=1;
			var c = document.getElementById(id).getElementsByTagName(tag);
                  for(var i = 0;i < c.length;i++){
                      //if(c[i].name=btn){
                          total++;
                       // }
                      }	
	        var b = document.getElementsByTagName("*")
			for (j=1; j<=total; j++){
				if(document.getElementById(btn+j)!=null){
			b[btn+j].className=off;
				}
				if(div!=""){
			if(document.getElementById(div+j)!=null){
            b[div+j].style.display="none";
										}
				}
				if (j==num){
					if(document.getElementById(btn+j)!=null){
				b[btn+j].className=on;
					}
					if(div!=""){
				if(document.getElementById(div+j)!=null){
				b[div+j].style.display="block";
				}
					}
				}
			}
}

function hid(div){
	      var div=document.getElementById(div);
		  if(div){
		  div.style.display="none";
		  }
}
function blo(div){
	      var div=document.getElementById(div);
		   if(div){
		  div.style.display="block";
		  }
}
function disp(div){
	    var div=document.getElementById(div);
		if(div.style.display=="none"){
			div.style.display="block";
		}else{
			div.style.display="none"
		}
}


function show_nav(num){
	     show(num,'nav_','','nav_off','nav_on','nav','li');
}
function show_shop_nav(num){
	     show(num,'shop_nav_','','shop_nav_off','shop_nav_on','shop_nav','div');
}