function sectionNav(id){
    var pN = document.getElementById(id);
    var menuDiv = pN.getElementsByTagName("div")[0];
    pN.onmouseover=function(e){
    var eT, t, f, current, isIE=false;
    if(!e) e = event;
    eT = e.type;
    f = e[(window.Event)?((eT=='mouseover')?'relatedTarget':'target'):'fromElement'];
    t = e[(window.Event)?((eT!='mouseover')?'relatedTarget':'target'):'toElement'];
    while(t&&t.nodeName.match(/(A|#text)/)){t=t.parentNode;}
    if(t==pN || containsNode(menuDiv,t) || containsNode(menuDiv,t) || containsNode(pN,t)){menuDiv.style["visibility"]='visible';}else{menuDiv.style["visibility"]='hidden';}
    if(!containsNode(pN,t)){menuDiv.style["visibility"]='hidden';}
    }
    function containsNode(a,b){
        while(b&&(a!=b)&&(b!=null))
            b=b.parentNode;
        return(a==b);
    }
    pN.onmouseout = pN.onmouseover;
}