function intercambiar(x,y){
window.document.getElementById("central").src=x;
window.document.getElementById("nota").src=y;
}


function disableselect(e){
return false
}
function reEnable(){
return true
}
document.onselectstart=new Function ("return false")
if (window.sidebar){
document.onmousedown=disableselect
document.onclick=reEnable
}

function glosario( termino, altura) {
   gwin=window.open(termino,"","left=,top=,toolbar=no,scrollbars=no,directories=no,status=no,menubar=no,resizable=no,width=250, left=250, top=250,screenX=250,screenY=250,height="+altura);
}

function intercambiar(x){
window.document.getElementById("central").src=x;
}

function ver2(x,y)
{
window.document.getElementById(x).style.visibility="visible";
window.document.getElementById(y).style.visibility="hidden";
}

function ver3(x,y,z)
{
window.document.getElementById(x).style.visibility="visible";
window.document.getElementById(y).style.visibility="hidden";
window.document.getElementById(z).style.visibility="hidden";
}

function ver4(x,y,z,w)
{
window.document.getElementById(x).style.visibility="visible";
window.document.getElementById(y).style.visibility="hidden";
window.document.getElementById(z).style.visibility="hidden";
window.document.getElementById(w).style.visibility="hidden";
}
function ver5(x,y,z,w,a)
{
window.document.getElementById(x).style.visibility="visible";
window.document.getElementById(y).style.visibility="hidden";
window.document.getElementById(z).style.visibility="hidden";
window.document.getElementById(w).style.visibility="hidden";
window.document.getElementById(a).style.visibility="hidden";
}
function ver6(b,x,y,z,w,a)
{
window.document.getElementById(b).style.visibility="visible";
window.document.getElementById(x).style.visibility="hidden";
window.document.getElementById(y).style.visibility="hidden";
window.document.getElementById(z).style.visibility="hidden";
window.document.getElementById(w).style.visibility="hidden";
window.document.getElementById(a).style.visibility="hidden";
}