function chivatocampo (id) {
document.getElementById(id).style.backgroundColor='#ffcc00';
document.getElementById(id).style.color='#000000';
}

function chivatocampooff (id) {
document.getElementById(id).style.backgroundColor='#ffffff';
document.getElementById(id).style.color='#000000';
}

//if (navigator.platform == "Win32" && navigator.appName == "Microsoft Internet Explorer" && window.attachEvent) {
//document.writeln('<style type="text/css">img { visibility:hidden; } </style>');
//window.attachEvent("onload", fnLoadPngs);
//}

//function fnLoadPngs() {
//var rslt = navigator.appVersion.match(/MSIE (\d+\.\d+)/, '');
//var itsAllGood = (rslt != null && Number(rslt[1]) >= 5.5);

//for (var i = document.images.length - 1, img = null; (img = document.images[i]); i--) {
//if (itsAllGood && img.src.match(/\.png$/i) != null) {
//var src = img.src;
//img.style.width = img.width + "px";
//img.style.height = img.height + "px";
//img.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + src + "', sizingMethod='scale')"
//img.src = "\images/x.gif";
//}
//img.style.visibility = "visible";
//}
//}