var NumBGImages = 5;
var randNum = Math.floor(Math.random() * NumBGImages);
var cor = new Array(10);

// Colocar as cores de fundo da coluna da esquerda, referentes a cada foto:
cor[0]="#296BC9";
cor[1]="#296BC9";
cor[2]="#C2D4E2";
cor[3]="#FCB758";
cor[4]="#93010B";
cor[5]="#2222FF";
cor[6]="#2222FF";
cor[7]="#2222FF";
cor[8]="#2222FF";
cor[9]="#2222FF";
document.write('<table width="100%" border="0" cellspacing="0" cellpadding="0" height="100%" bgcolor='+cor[randNum]+'><tr><td valign=top>');
document.write('<img src="images/' + randNum + '.jpg" alt="" border="0" width="199" height="363">');
document.write('</td></tr></table>');