if (document.images) 
{
image1 = new Image
image2 = new Image
image3 = new Image
image4 = new Image
image5 = new Image
image6 = new Image
image1.src = 'images/menu/MenuPortfolio01.png'
image2.src = 'images/menu/MenuPortfolio02.png'
image3.src = 'images/menu/MenuPartners01.png'
image4.src = 'images/menu/MenuPartners02.png'
image5.src = 'images/menu/MenuContact01.png'
image6.src = 'images/menu/MenuContact02.png'
}