document.onclick=check;
function check(e){
var target = (e && e.target) || (event && event.srcElement);
var obj = document.getElementById('categories');
var obj2 = document.getElementById('sho');
checkParent(target)?obj.style.display='none':null;
target==obj2?obj.style.display='block':null;
}
function checkParent(t){
while(t.parentNode){
if(t==document.getElementById('mydiv')){
return false
}
t=t.parentNode
}
return true
}
function showMenu() { document.getElementById('categories').style.display='block'; }
function hideMenu() { document.getElementById('categories').style.display='none'; }

function a(txt) { window.status = txt } function b() { window.status = ""; }