function setDisplay(thisitem, startstate)
{
    callname    = "mainMenu" + thisitem;
    divname     = "subMenu" + thisitem;

    this.numberofmenuitems = 3;

    this.caller = document.getElementById(callname);
    this.thediv = document.getElementById(divname);

    this.thediv.style.visibility = startstate;
}

//menu methods
function menuHandler(theobj)
{
    var i = "1";
    var shutdiv;

    for (i; i <= theobj.numberofmenuitems; i++)
    {
        shutdiv = eval("menuitem" + i + ".thediv");

        shutdiv.style.visibility = "hidden";
    }
    theobj.thediv.style.visibility = "visible";
}