var show = new Array();
show['materialsMenu']=0;
show['designMenu']=0;
show['workmanshipMenu']=0;

function preHide(menu) {
 show[menu]=0;
 setTimeout("hideMenu('" + menu + "')",400);
 return true;
}

function preShow(menu) {
 show[menu]=1;
 hideAll();
 showMenu(menu);
 return true;
}

function hideMenu(menu) {
 if (show[menu]==0) {
  document.getElementById(menu).style.visibility = 'hidden';
 }
}

function showMenu(menu) {
 show[menu]=1;
 document.getElementById(menu).style.visibility = 'visible';
}

function hideAll() {
 hideMenu('materialsMenu');
 hideMenu('designMenu');
 hideMenu('workmanshipMenu');
 show['materialsMenu']=0;
 show['designMenu']=0;
 show['workmanshipMenu']=0;
}