var currentlyShowing = false;

function ShowMenuNav(fArg)
{
 HideAllMenuNav();
 currentlyShowing = true;
 var menuObj = (document.getElementById) ? document.getElementById('mn' + fArg) : eval("document.all['mn" + fArg + "']");
 if(menuObj){menuObj.style.display = "block";}
}

function HideAllWithDelay(secondsDelay)
{
 currentlyShowing = false;
 setTimeout('if(!currentlyShowing){HideAllMenuNav()}',secondsDelay * 1000);
}

function HideAllMenuNav()
{
/*for(i=0;;i++){elem = document.all(i);if(elem == null) break;if(elem.id.indexOf("mn") == 0){elem.style.display = "none";}}*/
 document.getElementById("mnProduct").style.display = "none";
 document.getElementById("mnTryIt").style.display = "none";
 document.getElementById("mnInfo").style.display = "none";
 document.getElementById("mnCaseStudies").style.display = "none";
 document.getElementById("mnSpacer").style.display = "none";
}