function setMenu(page) {
    if (page == 'welcome') {
        top.topFrame.document.welcome.src='images/welcomeover.gif'
    } else {
        top.topFrame.document.welcome.src='images/welcomeup.gif'
    }
    if (page == 'products') {
        top.topFrame.document.products.src='images/products_and_services_over.gif'
    } else {
        top.topFrame.document.products.src='images/products_and_services_up.gif'
    }
    if (page == 'company') {
        top.topFrame.document.company.src='images/about_softcase_over.gif'
    } else {
        top.topFrame.document.company.src='images/about_softcase_up.gif'
    }
    if (page == 'contact') {
        top.topFrame.document.contact.src='images/contactusover.gif'
    } else {
        top.topFrame.document.contact.src='images/contactusup.gif'
    }
}