var corMouse = "#ffffff";
var corFundo = "#dddddd"
function trocaCor(evt) {
	var id;
	if (navigator.appName == 'Netscape') id = evt.target.id;
	else id = evt.srcElement.id; 
	var cor = document.getElementById(id).style.background;
	document.getElementById(id).style.background = corMouse;
	document.getElementById(id).style.fontWeight = 'bold';
}
function limpaCor(evt) {
	var id;
	if (navigator.appName == 'Netscape') id = evt.target.id;
	else id = evt.srcElement.id; 
	var cor = document.getElementById(id).style.background;
	document.getElementById(id).style.background = corFundo;
	document.getElementById(id).style.fontWeight = '';
}