//**** Função para abrir janela popup
function openLink(mypage, myname, w, h, scroll)
{
	pos_left = (screen.width - w) / 2
	pos_top = (screen.height - h) / 2
	winprops = 'height='+h+',width='+w+',scrollbars='+scroll+',left='+ pos_left +',top='+ pos_top +''
	win = window.open(mypage, myname, winprops)
	if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}