var breite = screen.width;
document.writeln('');
switch (breite)
{
case 640: document.writeln(''); break;
case 800: document.writeln(''); break;
case 1024: document.writeln(''); break;
case 1152: document.writeln(''); break;
case 1280: document.writeln(''); break;
case 1600: document.writeln(''); break;
default:
if (breite < 1000)
{
document.writeln('');
}
else
{
document.writeln('');
};
break;
}