function zobraz_cas()
{
 var currentTime = new Date();
 var month = currentTime.getMonth() + 1;
 var day = currentTime.getDate();
 var year = currentTime.getFullYear();
 var hours = currentTime.getHours();
 var minutes = currentTime.getMinutes();
 var secs = currentTime.getSeconds();
 
 if ( hours < 10 ) hours = '0' + hours;
 if ( minutes < 10 ) minutes = '0' + minutes;
 
 document.write(day + "." + month + "." + year + ", " + hours + ":" + minutes);
}