function abut()
{
if ( document.documentElement)
{
document.getElementById('aboutL').style.display="none";
document.getElementById('about').style.display="block";
return;
}
else { return; }
}


function writecls()
{
if ( document.documentElement)
{
document.write('<p class\=\"nav cent\">\&\#091\;\xA0<a rel\=\"div\" href\=\"\#aboutH\" title\=\"Hide this Explanation\" ');
document.write('onclick\=\"cls\(\)\; return true\;\" onkeypress\=\"cls\(\)\; return true\;\">');
document.write('Hide this Explanation<\/a>\xA0\&\#093\;<\/p>');
return;
}
else { return; }
}

function cls()
{
document.getElementById('aboutL').style.display="block";
document.getElementById('about').style.display="none";
return;
}