if (screen.width==800||screen.height==600) //if 800x600
window.location.replace("http://www.maxisalimentos.com.br/sites")

else if (screen.width==640||screen.height==480) //if 640x480
window.location.replace("http://www.ater.com.br")

else if (screen.width==1024||screen.height==768) //if 1024x768
window.location.replace("#")

else //if all else
window.location.replace("http://www.maxisalimentos.com.br/site")