var heute    = new Date();
var datum    = new Date(2011, 6, 10);
var sekunden = datum.getTime() - heute.getTime();
var tage     = Math.ceil(sekunden / (1000 * 60 * 60 * 24))*-1;
document.write("<font color=#000000><font size=+2>"+tage+"<\/font><\/font>")