Hiệu ứng tạo hai đồng hồ bấm giờ với thời gian tăng và giảm, bạn có thể cho từng cái hoặc cả hai cùng chạy.
JavaScript:
<SCRIPT language=JavaScript>
<!-- Begin
var up,down;
var min1,sec1;
var cmin1,csec1,cmin2,csec2;
function Minutes(data) {
for(var i=0;i<data.length;i++) if(data.substring(i,i+1)==":") break;
return(data.substring(0,i)); }
function Seconds(data) {
for(var i=0;i<data.length;i++) if(data.substring(i,i+1)==":") break;
return(data.substring(i+1,data.length)); }
function Display(min,sec) {
var disp;
if(min<=9) disp=" 0";
else disp=" ";
disp+=min+":";
if(sec<=9) disp+="0"+sec;
else disp+=sec;
return(disp); }
function Up() {
cmin1=0;
csec1=0;
min1=0+Minutes(document.sw.beg1.value);
sec1=0+Seconds(document.sw.beg1.value);
UpRepeat(); }
function UpRepeat() {
csec1++;
if(csec1==60) { csec1=0; cmin1++; }
document.sw.disp1.value=Display(cmin1,csec1);
if((cmin1==min1)&&(csec1==sec1)) alert("Stopwatch Stopped");
else up=setTimeout("UpRepeat()",1000); }
function Down() {
cmin2=1*Minutes(document.sw.beg2.value);
csec2=0+Seconds(document.sw.beg2.value);
DownRepeat(); }
function DownRepeat() {
csec2--;
if(csec2==-1) { csec2=59; cmin2--; }
document.sw.disp2.value=Display(cmin2,csec2);
if((cmin2==0)&&(csec2==0)) alert("Countdown Stopped");
else down=setTimeout("DownRepeat()",1000); }
// End -->
</SCRIPT>
JavaScript:
<SCRIPT language=JavaScript>
<!-- Begin
var up,down;
var min1,sec1;
var cmin1,csec1,cmin2,csec2;
function Minutes(data) {
for(var i=0;i<data.length;i++) if(data.substring(i,i+1)==":") break;
return(data.substring(0,i)); }
function Seconds(data) {
for(var i=0;i<data.length;i++) if(data.substring(i,i+1)==":") break;
return(data.substring(i+1,data.length)); }
function Display(min,sec) {
var disp;
if(min<=9) disp=" 0";
else disp=" ";
disp+=min+":";
if(sec<=9) disp+="0"+sec;
else disp+=sec;
return(disp); }
function Up() {
cmin1=0;
csec1=0;
min1=0+Minutes(document.sw.beg1.value);
sec1=0+Seconds(document.sw.beg1.value);
UpRepeat(); }
function UpRepeat() {
csec1++;
if(csec1==60) { csec1=0; cmin1++; }
document.sw.disp1.value=Display(cmin1,csec1);
if((cmin1==min1)&&(csec1==sec1)) alert("Stopwatch Stopped");
else up=setTimeout("UpRepeat()",1000); }
function Down() {
cmin2=1*Minutes(document.sw.beg2.value);
csec2=0+Seconds(document.sw.beg2.value);
DownRepeat(); }
function DownRepeat() {
csec2--;
if(csec2==-1) { csec2=59; cmin2--; }
document.sw.disp2.value=Display(cmin2,csec2);
if((cmin2==0)&&(csec2==0)) alert("Countdown Stopped");
else down=setTimeout("DownRepeat()",1000); }
// End -->
</SCRIPT>
HTML:
<FORM name=sw>
<TABLE width="100%" border=0>
<TBODY>
<TR align=middle>
<TD>
<TABLE width="100%" border=3>
<TBODY>
<TR>
<TH bgColor=#deb887 colSpan=2>Stopwatch</TH></TR>
<TR align=middle>
<TD>Stop at<BR><INPUT size=7 value=0:10 name=beg1></TD>
<TD><INPUT onclick=Up() type=button value=Start></TD></TR>
<TR align=middle>
<TD bgColor=#deb887 colSpan=2><INPUT size=9
name=disp1></TD></TR></TBODY></TABLE></TD>
<TD><INPUT onclick=Up();Down() type=button value="Start Both"></TD>
<TD>
<TABLE width="100%" border=3>
<TBODY>
<TR>
<TH bgColor=#deb887 colSpan=2>Countdown</TH></TR>
<TR align=middle>
<TD>Start at<BR><INPUT size=7 value=0:10 name=beg2></TD>
<TD><INPUT onclick=Down() type=button value=Start></TD></TR>
<TR align=middle>
<TD bgColor=#deb887 colSpan=2><INPUT size=9
name=disp2></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></FORM>
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