function opWin(url,id,w,h,param) {
				t = (screen.height-h)/2;
				l = (screen.width-w)/2;
				nwin = window.open("" + url + "","","left=" + l + ","+ param +",top=" + t + ",width=" + w + ",height=" + h +"");
				nwin.focus();
}

function opAtend() {
    opWin('http://atendimento.minas.com.br/request.php?l=atendimento&x=1&deptid=0&page=http://www.minas.com.br/atendimento.html','0','450','362');
}

function chgClass(n,c) {
	n.className = c;
}

function volta(url) {
    location.href=""+ url +"";
}