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counter.html
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counter.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>计数器</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" type="text/css" href="">
<style>
input.btns
{
border: 3px solid #fff;
border-radius: 15px;
width: 116.666667px;
height: 45px;
font-size: 1.25em;
background-color: #ccc;
}
input.sml
{
border: 2px solid #fff; border-radius: 5px; background-color: #ccc height: 1.1em;
}
input:hover
{
background: #fff;
transition-duration: 0.2s;
}
input:active
{
background: #888;
transition-duration: 0.2s;
}
</style>
<script src=""></script>
<script>
var ct = 1;
var i = 0;
function add()
{
i = i+ct;
document.getElementById("countvalue").value=i;
}
function sub()
{
i = i-ct;
document.getElementById("countvalue").value=i;
}
function reset()
{
i = 0;
document.getElementById("countvalue").value=i;
}
function readvalue()
{
i = document.getElementById("lastvalue").value;
if (i == "")
{
document.getElementById("countvalue").value=0;
}
else
{
document.getElementById("countvalue").value=i;
}
document.getElementById("lastvalue").value=null;
}
function ebi()
{
ct =+ document.getElementById("cts").value;
}
</script>
</head>
<body style="background-color: #999;">
<div style="border: 2px; background-color: #ccc; border-radius: 15px; padding: 10px;">
<table align="center">
<tr><td colspan="3">
<input type="text" id="countvalue" style="width: 350px; height: 50px; border: 3px solid #fff; border-radius: 15px; font-size: 2em; background-color: #eee" value="0" disabled /></td></tr>
<tr><td><input type="button" id="count" value="正计数" onclick="add()" class="btns" /></td><td><input type="button" id="count" value="倒计数" onclick="sub()" class="btns" /></td><td><input type="button" id="reset" value="重置" onclick="reset()" class="btns" /></td></tr><tr><td colspan="3"><a style="height: 30px;"></a></td></tr>
<tr><td colspan="3"><input type="text" id="lastvalue" placeholder="恢复上次的计数值或设置倒计数..." style="height: 1.3em; border: 2px solid #fff; border-radius: 5px; background-color: #e8e8e8;" /><a> </a><input type="button" id="read" value="恢复之前的计数值" class="sml" onclick="readvalue()" /></td></tr>
<tr><td colspan="3"><input type="text" id="cts" value="1" placeholder="输入计数值..." style="height: 1.3em; border: 2px solid #fff; border-radius: 5px; background-color: #e8e8e8;" /><a> </a><input type="button" id="ebi" value="设定计数值" onclick="ebi()" class="sml" /></td></tr>
</table>
</div>
</body>
</html>