📄 s10_08.htm
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<HTML>
<HEAD>
<META name="vs_defaultClientScript" content="JavaScript">
<META http-equiv="Content-Language" content="zh-cn">
<META name="vs_targetSchema" content="HTML 4.0">
<META name="GENERATOR" content="Microsoft FrontPage 5.0">
<META name="ProgId" content="FrontPage.Editor.Document">
<TITLE>可打开、关闭的数字时钟</TITLE>
<SCRIPT language="javascript">
<!--
var TM;//保存定时器句柄
function Time_Set()
{
TM = window.setTimeout( "Time_Set()", 1000 );
var today = new Date();
digit_clock.innerText = today.toLocaleString();
}
function btnControl_onclick()
{
if(btnControl.value=="打开时钟")
{
btnControl.value="关闭时钟";
Time_Set();//打开定时器
}
else
{
window.clearTimeout( TM );//关闭定时器
btnControl.value="打开时钟";
digit_clock.innerText="";
}
}
//-->
</SCRIPT>
</HEAD>
<BODY>
<P>
<INPUT type="button" id="btnControl" value="打开时钟" onclick="return btnControl_onclick()">
</P>
<P id="digit_clock" style="font-size: 36pt; color: #800080; font-weight: bold">
</P>
</BODY>
</HTML>
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