function onLoad()
{
    centerIconTable();
}

function onResize()
{
    centerIconTable();
}

// Center the home page icon table in window
function centerIconTable()
{
    var ictab = document.getElementById("iconTable");
    if ( ! ictab )
        return;

    // Center horizontally in window
    var tabWidth = parseInt(ictab.style.width);
    var iw = window.innerWidth; 
    if ( ! iw ) 
        iw = document.body.clientWidth;  // IE hack
    var lMarg = Math.floor((iw - tabWidth) / 2) - 5;
    if ( lMarg > 0 )
        ictab.style.marginLeft = lMarg + "px";

    // Center vertically
    var contentHeight = 500; // banner plus table
    var ih = window.innerHeight; 
    if ( ! ih ) 
        ih = document.documentElement.clientHeight;  // IE hack
    var tMarg = Math.floor((ih - contentHeight) / 2) - 15;
    if ( tMarg > 0 )
        ictab.style.marginTop = tMarg + "px";
}

// Hover over menu item, creating drop-down if applicable
function menuHover(item, over)
{
    var mitem = document.getElementById(item);
    if ( over == 1 ) {
        mitem.style.className = "menuHover";
        mitem.style.background = "#888";
    }
    else {
        mitem.style.className = "menuNormal";
        mitem.style.background = "#ccc";
    }

    if ( item == "products" && over ) {
        var pm = document.getElementById("prod_menu");
        pm.style.visibility = "visible";
        pm.style.position = "absolute";
        pm.style.top = "66px";
        pm.style.left = "54px";
        pm.style.height = "80px";
        pm.style.width = "100px";
    }
    else {
        var pm = document.getElementById("prod_menu");
        pm.style.visibility = "hidden";
    }
}