function toggleScroll() {
if(document.body.style.overflow=='hidden') document.body.style.overflow='auto';
else document.body.style.overflow='hidden';
}


function toggleLayer(whichLayer)
{
if (document.getElementById)
{
// this is the way the standards work
var style2 = document.getElementById(whichLayer).style;
if (style2.display == "none") style2.display = "block";
else if (style2.display == "block") style2.display = "none";

}
else if (document.all)
{
// this is the way old msie versions work
var style2 = document.all[whichLayer].style;
if (style2.display == "none") style2.display = "block";
else if (style2.display == "block") style2.display = "none";

}
else if (document.layers)
{
// this is the way nn4 works
var style2 = document.layers[whichLayer].style;
if (style2.display == "none") style2.display = "block";
else if (style2.display == "block") style2.display = "none";

}
}