if (document.images) {
    aboutbutton        = new Image();
    aboutbutton.src     = "Images/AboutButton_White.png";
    aboutbuttonover     = new Image();
    aboutbuttonover.src = "Images/AboutButton_Green.png";
    
    buybutton           = new Image();
    buybutton.src       = "Images/BuyButton_White.png";
    buybuttonover        = new Image();
    buybuttonover.src       = "Images/BuyButton_Green.png";

    visitbutton        = new Image();
    visitbutton.src    = "Images/VisitUs_White.png";
    visitbuttonover        = new Image();
    visitbuttonover.src    = "Images/VisitUs_Green.png";

    faqbutton        = new Image();
    faqbutton.src    = "Images/FaqButton_White.png";
    faqbuttonover        = new Image();
    faqbuttonover.src    = "Images/FaqButton_Green.png";

    contactbutton        = new Image();
    contactbutton.src    = "Images/ContactButton_White.png";
    contactbuttonover        = new Image();
    contactbuttonover.src    = "Images/ContactButton_Green.png";

    socialresponsibilitybutton        = new Image();
    socialresponsibilitybutton.src    = "Images/socialresponsibilityButton_White.png";
    socialresponsibilitybuttonover        = new Image();
    socialresponsibilitybuttonover.src    = "Images/socialresponsibilityButton_Green.png";

}

function buttonOver( buttonName){
    document.getElementById(buttonName);
    if(document.images) {
        document.getElementById( buttonName ).src = eval( buttonName + "over.src");
    }
}

function buttonOut( buttonName) {
    if(document.images) {
        document.getElementById( buttonName ).src = eval( buttonName + ".src");
    }
}

//function buttondown( buttonname )
//{
//    if (document.images) {
//      document[ buttonname ].src = eval( buttonname + ".src" );
//    }
//}
//function buttonup ( buttonname )
//{
//    if (document.images) {
//      document[ buttonname ].src = eval( buttonname + "up.src" );
//    }
//}