var w = screen.height;
if (navigator.userAgent.match(/Opera/i)){
document.write('')
}
else if (navigator.userAgent.match(/Safari/i)){
if ( w >= 768 ){
document.write('')
}
else if ( w < 768 ){
document.write('')
}
}
else if (navigator.userAgent.match(/Gecko/i)){
if ( w >= 768 ){
document.write('')
}
else if ( w < 768 ){
document.write('')
}
}
else if(navigator.userAgent.match(/Mac_PowerPC/i)){
document.write('')
}
else if(navigator.userAgent.match(/MSIE/i)){
if ( w >= 768 ){
document.write('')
}
else if ( w < 768 ){
document.write('')
}
}