function toggleLayer(whichLayer, ShowHide)
{
if (document.getElementById)
{
 // Standard Browser
 var strStyle = document.getElementById(whichLayer).style;
 if (ShowHide == "Show") {
 strStyle.display = "block"; }
 if (ShowHide == "Hide") {
 strStyle.display = ""; }
 if (ShowHide == "Toggle") {
 strStyle.display = strStyle.display? "":"block";}
} 
else if (document.all)
{
// Internet Explorer 6
var strStyle = document.all[whichLayer].style;
 if (ShowHide == "Show") {
 strStyle.display = "block"; }
 if (ShowHide == "Hide") {
 strStyle.display = ""; }
 if (ShowHide == "Toggle") {
 strStyle.display = strStyle.display? "":"block";}
}
else if (document.layers)
{
// Netscape
var strStyle = document.layers[whichLayer].style;
 if (ShowHide == "Show") {
 strStyle.display = "block"; }
 if (ShowHide == "Hide") {
 strStyle.display = ""; }
 if (ShowHide == "Toggle") {
 strStyle.display = strStyle.display? "":"block";}
}
}