function change_office()
{
document.getElementById("office").src
="images/buttons/office_on.gif";
document.getElementById("plan").src
="uploads/MPlans/Office.jpg";
document.getElementById("office-content").style.visibility
="visible";
document.getElementById("default-content").style.visibility
="hidden";
}

function change_flex()
{
document.getElementById("flex").src
="images/buttons/flex_on.gif";
document.getElementById("plan").src
="uploads/MPlans/Flex.jpg";
document.getElementById("flex-content").style.visibility
="visible";
document.getElementById("default-content").style.visibility
="hidden";
}

function change_hotel()
{
document.getElementById("hotel").src
="images/buttons/hotel_on.gif";
document.getElementById("plan").src
="uploads/MPlans/Hotel.jpg";
document.getElementById("hotel-content").style.visibility
="visible"
document.getElementById("default-content").style.visibility
="hidden";
}

function change_warehouse()
{
document.getElementById("warehouse").src
="images/buttons/warehouse_on.gif";
document.getElementById("plan").src
="uploads/MPlans/Warehouse.jpg";
document.getElementById("warehouse-content").style.visibility
="visible";
document.getElementById("default-content").style.visibility
="hidden";
}

function go_back()
{
document.getElementById("office").src
="images/buttons/office_off.gif";
document.getElementById("flex").src
="images/buttons/flex_off.gif";
document.getElementById("hotel").src
="images/buttons/hotel_off.gif";
document.getElementById("warehouse").src
="images/buttons/warehouse_off.gif";

document.getElementById("plan").src
="uploads/MPlans/primary.jpg";

document.getElementById("office-content").style.visibility
="hidden";
document.getElementById("flex-content").style.visibility
="hidden";
document.getElementById("hotel-content").style.visibility
="hidden";
document.getElementById("warehouse-content").style.visibility
="hidden";
document.getElementById("default-content").style.visibility
="visible";
}