< html >
< head >
< meta charset= "utf-8" >
< title > js-01.html < / title >

< script >

var today=new Date ();
var year=today.getYear ();
var month=today.getMonth ();
var hour=today.getHours ();
var minute=today.getMinutes ();
< / script >

< / head >

< body >

< input name= "btn_left" type= "button" onClick= "showTime ();" value= "time" >
< input name= "btn_right" type= "button" value= "clear" onClick= "clearContent ();" >
< div id= "content" >

</div>

< / body >
< script type= "text/javascript" >

function showTime(){
document.getElementById("content").innerHTML="<h1>:</h1>";
document.getElementById("content").innerHTML+="<h2>"+year+""+month+""+date+"</h2>";
document.getElementById("content").innerHTML+="<h2>"+hour+""+minute+"</h2>";

}
function clearContent () {

document.getElementById("content").innerHTML="";

}

</script>

< / html >