function set_n(i){$get(i).style.display='none';}
function set_y(i){$get(i).style.display='';}
function $get(id){return document.getElementById(id);}
function mIcon(obj,menu,i,b,n)
{for (j=0;j<=n;j++){if (j==i){$get(menu+j).className=obj+'_';$get(menu+'_'+j).style.display="";} 
else{$get(menu+j).className=obj;$get(menu+'_'+j).style.display="none";}}}