function abrir_pop() 
{ 
window.open ("http://chat.tecmac.eng.br/request_email.php?l=tecmac&x=1&deptid=0", 'Tecmac','toolbar=no,location=no,status=no,menubar=no,scrollbars=no,resizable=no,width=450,height=100');
} 

function abrir_tel() 
{ 
window.open ("telefone.php", 'Tecmac','toolbar=no,location=no,status=no,menubar=no,scrollbars=no,resizable=no,width=350,height=170');
} 

function abrir_ami() 
{ 
window.open ("amigo.php", 'Tecmac','toolbar=no,location=no,status=no,menubar=no,scrollbars=no,resizable=no,width=460,height=300');
} 

function abrir_video() 
{ 
window.open ("videos/video.html", "Janela", "status=no, width=400, height=301") 
}