var stop;
NS = (document.layers) ? 1 : 0;
IE = (document.all) ? 1: 0;
var d;
var x;

var sum_m=15; // sum of main menu 
var sum_sub_m=2;


function show(d)
               {
			   


                if(IE){
						 for(i=1;i<=sum_sub_m;i++) { 
					                          x="mm"+i;
                					          document.all[x].style.visibility="hidden";
											  }
				        document.all[d].style.visibility="visible";											  
						}
			   
	             else  {  
				        document[d].visibility='visible';
					}               
                }



	   
 
			
function hide(d)
               {
			   d2=d;
               if (IE) stop=setTimeout('document.all.'+d2+'.style.visibility="hidden"',1000);

               else stop=setTimeout('document[d2].visibility="hidden"',1000);
			   }			   
			   


function dh(){
              clearTimeout(stop)
}