var toggle = "Portrait";

function fToggle() {
    setLinkedStyleSheet(toggle);
}

function setLinkedStyleSheet(title) {
    var linkNodes = document.getElementsByTagName("link");
    for ( i = 0; i < linkNodes.length; i++ ) {
        linkNode = linkNodes[i];
        relAttr = linkNode.getAttribute('rel');
        if ( relAttr && ( relAttr.indexOf("style") != -1 ) && linkNode.getAttribute("title") ) {
            linkNode.disabled = true;
            if ( linkNode.getAttribute("title") == title )
                linkNode.disabled = false;
        }
    }
    var butan = document.getElementById("gomer");
    toggle = (toggle == "Landscape")?"Portrait":"Landscape";
    butan.value=toggle;
}