function HideAllProductDivs() {
    var DivElements = document.getElementsByTagName("div");
    var CurElement = 0;

    while (CurElement < DivElements.length) {
        if (DivElements[CurElement].className == "item_container") {
            DivElements[CurElement].style.display = "none";
        }
        CurElement = CurElement + 1;
    }
}

function UnselectMenuItems() {
    var TdElements = document.getElementsByTagName("td");
    var CurElement = 0;

    while (CurElement < TdElements.length) {
        if (TdElements[CurElement].className.search(/Active/i) > -1) {
            TdElements[CurElement].className = "Inactive";
        }
        CurElement = CurElement + 1;
    }
}

function HideNShow(SectionID) {
    HideAllProductDivs();
    UnselectMenuItems();

    document.getElementById(SectionID).style.display = "block";
    document.getElementById("btn" + SectionID).className = "Active";
}

/*window.onload = function() {
    var firstButtonID = document.getElementById("btnItem_1");
    var firstContentID = document.getElementById("Item_1");
    firstButtonID.className = "Active";
    firstContentID.style.display = "block";
}*/