if (screen.height>=1040 )
{
document.write('');
}
else if (screen.height>=1000) {
document.write('');
}
else if (screen.height>=900) {
document.write('');
}
else if (screen.height>800) {
document.write('');
}
else if (screen.height<=800) {
document.write('');
}
else {
document.write('');
}