1. Chèn đoạn code sau vào tệp tài liệu HTML
Code:
<script type="text/javascript">
function showtime(){
if (!document.all& &!document.getElementById)
return
thelement=document.getElementById? document.getElementById("tick2"): document.all.tick2
var Digital=new Date()
var hours=Digital.getHours()
var minutes=Digital.getMinutes()
var seconds=Digital.getSeconds()
var dn="PM"
if (hours<12)
dn="AM"
if (hours>12)
hours=hours-12
if (hours==0)
hours=12
if (minutes<=9)
minutes="0"+minutes
if (seconds<=9)
seconds="0"+seconds
var ctime=hours+":"+minutes+":"+seconds+" "+dn
thelement.innerHTML="<b style='font-size:14;color:blue;'>"+ctime+"</b>"
setTimeout("showtime()",1000)
}
window.onload=showtime
</script>
2. Chèn vào trong thẻ này
<span id=tick2></span>3. Để thay đồi màu của đồng hồ
thelement.innerHTML="<b style='font-size:14;color:blue;'>"+ctime+"</b>"Bạn có thể đổi màu "color:blue;" (xanh) thành "color:red;" (đỏ) hoặc "color:black;" (đen)…..
Code 2:
<script language="JavaScript">
//Analog clock script- By VnTim™ (admin@vntim.co.cc)
//Script featured on Dynamic Drive
//Visit http://vntim.blogspot.com/ for this script and more
fCol='444444'; //face colour.
sCol='FF0000'; //seconds colour.
mCol='444444'; //minutes colour.
hCol='444444'; //hours colour.
Ybase=30; //Clock height.
Xbase=30; //Clock width.
H='...';
H=H.split('');
M='....';
M=M.split('');
S='.....';
S=S.split('');
NS4=(document.layers);
NS6=(document.getElementById&&!document.all);
IE4=(document.all);
Ypos=0;
Xpos=0;
dots=12;
Split=360/dots;
if (NS6){
for (i=1; i < dots+1; i++){
document.write('<div id="n6Digits'+i+'" style="position:absolute;top:0px;left:0px;width:30px;height:30px;font-family:Arial;font-size:10px;color:#'+fCol+';text-align:center;padding-top:10px">'+i+'</div>');
}
for (i=0; i < M.length; i++){
document.write('<div id="Ny'+i+'" style="position:absolute;top:0px;left:0px;width:2px;height:2px;font-size:2px;background:#'+mCol+'"></div>');
}
for (i=0; i < H.length; i++){
document.write('<div id="Nz'+i+'" style="position:absolute;top:0px;left:0px;width:2px;height:2px;font-size:2px;background:#'+hCol+'"></div>');
}
for (i=0; i < S.length; i++){
document.write('<div id="Nx'+i+'" style="position:absolute;top:0px;left:0px;width:2px;height:2px;font-size:2px;background:#'+sCol+'"></div>');
}
}
if (NS4){
dgts='1 2 3 4 5 6 7 8 9 10 11 12';
dgts=dgts.split(' ')
for (i=0; i < dots; i++){
document.write('<layer name=nsDigits'+i+' top=0 left=0 height=30 width=30><center><font face=Arial size=1 color='+fCol+'>'+dgts[i]+'</font></center></layer>');
}
for (i=0; i < M.length; i++){
document.write('<layer name=ny'+i+' top=0 left=0 bgcolor='+mCol+' clip="0,0,2,2"></layer>');
}
for (i=0; i < H.length; i++){
document.write('<layer name=nz'+i+' top=0 left=0 bgcolor='+hCol+' clip="0,0,2,2"></layer>');
}
for (i=0; i < S.length; i++){
document.write('<layer name=nx'+i+' top=0 left=0 bgcolor='+sCol+' clip="0,0,2,2"></layer>');
}
}
if (IE4){
document.write('<div style="position:absolute;top:0px;left:0px"><div style="position:relative">');
for (i=1; i < dots+1; i++){
document.write('<div id="ieDigits" style="position:absolute;top:0px;left:0px;width:30px;height:30px;font-family:Arial;font-size:10px;color:'+fCol+';text-align:center;padding-top:10px">'+i+'</div>');
}
document.write('</div></div>')
document.write('<div style="position:absolute;top:0px;left:0px"><div style="position:relative">');
for (i=0; i < M.length; i++){
document.write('<div id=y style="position:absolute;width:2px;height:2px;font-size:2px;background:'+mCol+'"></div>');
}
document.write('</div></div>')
document.write('<div style="position:absolute;top:0px;left:0px"><div style="position:relative">');
for (i=0; i < H.length; i++){
document.write('<div id=z style="position:absolute;width:2px;height:2px;font-size:2px;background:'+hCol+'"></div>');
}
document.write('</div></div>')
document.write('<div style="position:absolute;top:0px;left:0px"><div style="position:relative">');
for (i=0; i < S.length; i++){
document.write('<div id=x style="position:absolute;width:2px;height:2px;font-size:2px;background:'+sCol+'"></div>');
}
document.write('</div></div>')
}
function clock(){
time = new Date ();
secs = time.getSeconds();
sec = -1.57 + Math.PI * secs/30;
mins = time.getMinutes();
min = -1.57 + Math.PI * mins/30;
hr = time.getHours();
hrs = -1.57 + Math.PI * hr/6 + Math.PI*parseInt(time.getMinutes())/360;
if (NS6){
Ypos=window.pageYOffset+window.innerHeight-Ybase-25;
Xpos=window.pageXOffset+window.innerWidth-Xbase-30;
for (i=1; i < dots+1; i++){
document.getElementById("n6Digits"+i).style.top=Ypos-15+Ybase*Math.sin(-1.56 +i *Split*Math.PI/180)
document.getElementById("n6Digits"+i).style.left=Xpos-15+Xbase*Math.cos(-1.56 +i*Split*Math.PI/180)
}
for (i=0; i < S.length; i++){
document.getElementById("Nx"+i).style.top=Ypos+i*Ybase/4.1*Math.sin(sec);
document.getElementById("Nx"+i).style.left=Xpos+i*Xbase/4.1*Math.cos(sec);
}
for (i=0; i < M.length; i++){
document.getElementById("Ny"+i).style.top=Ypos+i*Ybase/4.1*Math.sin(min);
document.getElementById("Ny"+i).style.left=Xpos+i*Xbase/4.1*Math.cos(min);
}
for (i=0; i < H.length; i++){
document.getElementById("Nz"+i).style.top=Ypos+i*Ybase/4.1*Math.sin(hrs);
document.getElementById("Nz"+i).style.left=Xpos+i*Xbase/4.1*Math.cos(hrs);
}
}
if (NS4){
Ypos=window.pageYOffset+window.innerHeight-Ybase-20;
Xpos=window.pageXOffset+window.innerWidth-Xbase-30;
for (i=0; i < dots; ++i){
document.layers["nsDigits"+i].top=Ypos-5+Ybase*Math.sin(-1.045 +i*Split*Math.PI/180)
document.layers["nsDigits"+i].left=Xpos-15+Xbase*Math.cos(-1.045 +i*Split*Math.PI/180)
}
for (i=0; i < S.length; i++){
document.layers["nx"+i].top=Ypos+i*Ybase/4.1*Math.sin(sec);
document.layers["nx"+i].left=Xpos+i*Xbase/4.1*Math.cos(sec);
}
for (i=0; i < M.length; i++){
document.layers["ny"+i].top=Ypos+i*Ybase/4.1*Math.sin(min);
document.layers["ny"+i].left=Xpos+i*Xbase/4.1*Math.cos(min);
}
for (i=0; i < H.length; i++){
document.layers["nz"+i].top=Ypos+i*Ybase/4.1*Math.sin(hrs);
document.layers["nz"+i].left=Xpos+i*Xbase/4.1*Math.cos(hrs);
}
}
if (IE4){
Ypos=document.body.scrollTop+window.document.body.clientHeight-Ybase-20;
Xpos=document.body.scrollLeft+window.document.body.clientWidth-Xbase-20;
for (i=0; i < dots; ++i){
ieDigits[i].style.pixelTop=Ypos-15+Ybase*Math.sin(-1.045 +i *Split*Math.PI/180)
ieDigits[i].style.pixelLeft=Xpos-15+Xbase*Math.cos(-1.045 +i *Split*Math.PI/180)
}
for (i=0; i < S.length; i++){
x[i].style.pixelTop =Ypos+i*Ybase/4.1*Math.sin(sec);
x[i].style.pixelLeft=Xpos+i*Xbase/4.1*Math.cos(sec);
}
for (i=0; i < M.length; i++){
y[i].style.pixelTop =Ypos+i*Ybase/4.1*Math.sin(min);
y[i].style.pixelLeft=Xpos+i*Xbase/4.1*Math.cos(min);
}
for (i=0; i < H.length; i++){
z[i].style.pixelTop =Ypos+i*Ybase/4.1*Math.sin(hrs);
z[i].style.pixelLeft=Xpos+i*Xbase/4.1*Math.cos(hrs);
}
}
setTimeout('clock()',100);
}
clock();
//-->
</script>
Code một trang đồng hồ mẫu hoàn chỉnh.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Dong ho bang JavaScript By VnTim</title>
</head>
<body>
<form name="BM1">
<input type="text" name="MucVB">
</form>
<script language="javascript">
function HamThoiGian(){
// Khoi tao doi tuong thoi gian.
var ThoiGian = new Date(); // Khoi tao doi tuong Date.
var Gio = ThoiGian.getHours(); // Lay gia tri gio tu doi tuong Date.
var Phut = ThoiGian.getMinutes(); // Lay phút tu doi tuong Date.
var Giay = ThoiGian.getSeconds(); // Lay giây tu doi tuong Date
// Thêm so 0 vào truoc so chi thoi gian neu nhu nó nho hon 10.
if(Gio<10){
Gio="0"+Gio;}
if(Phut<10){
Phut="0"+Phut;}
if(Giay<10){
Giay="0"+Giay;}
// Xuat ket qua ra muc nhap van ban có tên MucVB
document.BM1.MucVB.value="Bay gio la: "+Gio+":"+Phut+":"+Giay;
// Goi lai hàm HamThoiGian sau moi mot giây trôi qua.
}
setInterval("HamThoiGian()",1000); // Su dung setInterval de goi lap di lap lai hàm HamThoiGian sau 1 giây.
</script>
</body>
</html>
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