function frameOpen(frame) {

window.open('mainframe.htm','_parent')

}

function hideSideMenu() {
    top.sidebar.document.all.opticians.style.visibility = "hidden"
    top.sidebar.document.all.chiropody.style.visibility = "hidden"
    top.sidebar.document.all.reflexology.style.visibility = "hidden"
    top.sidebar.document.all.acupuncture.style.visibility = "hidden"
    top.sidebar.document.all.hypnotherapy.style.visibility = "hidden"
    top.sidebar.document.all.hearing.style.visibility = "hidden"
    top.sidebar.document.all.sports.style.visibility = "hidden"
}

function sideMenu(navlayer) {
    hideSideMenu()

    if (navlayer == "opticians") {
        top.sidebar.document.all.opticians.style.visibility = "visible"
    }
    if (navlayer == "aboutus") {
        top.sidebar.document.all.aboutus.style.visibility = "visible"
    }
    if (navlayer == "chiropody") {
        top.sidebar.document.all.chiropody.style.visibility = "visible"
    }
    if (navlayer == "reflexology") {
        top.sidebar.document.all.reflexology.style.visibility = "visible"
    }
    if (navlayer == "hypnotherapy") {
        top.sidebar.document.all.hypnotherapy.style.visibility = "visible"
    }
    if (navlayer == "acupuncture") {
        top.sidebar.document.all.acupuncture.style.visibility = "visible"
    }
    if (navlayer == "hearing") {
        top.sidebar.document.all.hearing.style.visibility = "visible"
    }
    if (navlayer == "sports") {
        top.sidebar.document.all.sports.style.visibility = "visible"
    }
}