function AddToCart(txtID, itemID) {
    // Get textbox
    var txtBox = document.getElementById(txtID);

    // Set qty
    var qty = 1;

    if (txtBox != null && !(isNaN(parseInt(txtBox.value)))) {
        qty = txtBox.value;
    }

    // Redirect to shopping cart
    window.location = "../ShoppingCart.aspx?partID=" + itemID + "&Qty=" + qty;
}