function toggleLayer(whichLayer)
{ if (document.getElementById)
{ var style2 = document.getElementById(whichLayer).style; style2.display = style2.display? "":"block";}
else if (document.all)
{ var style2 = document.all[whichLayer].style; style2.display = style2.display? "":"block";}
else if (document.layers)
{ var style2 = document.layers[whichLayer].style; style2.display = style2.display? "":"block";}
}