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014-加法计算器.html
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014-加法计算器.html
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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<style>
*{ margin:0px; padding:0px;list-style:none; font-size:12px;}
</style>
<script>
//parseInt 整数转换
//parseFloat 小数转换
window.onload = function ()
{
var oTxt1 = document.getElementById("txt1");
var oTxt2 = document.getElementById("txt2");
var oBtn = document.getElementById("btn");
oBtn.onclick = function ()
{
var num = parseFloat(oTxt1.value) + parseFloat(oTxt2.value);
if(isNaN(num))
{
alert("请输入数字");
}else
{
alert(num);
}
}
}
</script>
</head>
<body>
<div style="margin-left:100px;">
<input id="txt1" type="text" />
<input id="txt2" type="text" />
<input id="btn" type="button" value="求和" />
</div>
</body>
</html>