function AbreAba(nome_div)
{
var total_divs = document.getElementsByTagName('div').length;
var div = "";
var td = "";

for (var i=1; i < total_divs+1; i++)
{
div = "div"+i;
td = "td"+i;
document.getElementById(div).style.display = "none";
document.getElementById(td).style.backgroundColor = "";
document.getElementById(div).className="div";

if (div == nome_div)
{
document.getElementById(nome_div).style.display = "block";
document.getElementById(td).style.backgroundColor = "#CCCCCC";
}
}
}