function rollmouseover(showhidden1, hideshow1)
{
if (document.getElementById)
{
// this is the way the standards work
var showhide = document.getElementById(showhidden1).style;
showhide.display = showhide.display? "":"inline";
showhide.zIndex = 2;

var showhide4 = document.getElementById(hideshow1).style;
showhide4.display = showhide4.display? "":"none";
showhide4.zIndex = -2;
}
else if (document.all)
{
// this is the way old msie versions work
var showhide = document.all[showhidden1].style;
showhide.display = showhide.display? "":"inline";
showhide.zIndex = 2;

var showhide4 = document.all[hideshow1].style;
showhide4.display = showhide4.display? "":"none";
showhide4.zIndex = -2;
}
else if (document.layers)
{
// this is the way nn4 works
var showhide = document.layers[showhidden1].style;
showhide.display = showhide.display? "":"inline";
showhide.zIndex = 2;

var showhide4 = document.layers[hideshow1].style;
showhide4.display = showhide4.display? "":"none";
showhide4.zIndex = -2;
}
}