function showDrop(id){var d=document.getElementById(id);if(d){d.style.display='block';}}
function hideDrop(id){var d=document.getElementById(id);if(d){d.style.display='none';}}
function showSMenu(i){var mainID='topnav_'+i;var mainE=document.getElementById(mainID);if(mainE){newID=mainID+'hover';mainE.id=newID;}
showDrop(i+'_drop');}
function hideSMenu(i){var mainID='topnav_'+i;var mainE=document.getElementById(mainID+'hover');if(mainE){mainE.id=mainID;}
hideDrop(i+'_drop');}