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  • 简易计算器,欢迎大神指点 改进

    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="UTF-8">
    <title></title>
    <script type="text/javascript">
    onload = function() {
    document.getElementById('add').onclick = function(){
    var iNum1 = document.getElementById('Num1').value;
    var iNum2 = document.getElementById('Num2').value;
    var iNum = parseInt(iNum1) + parseInt(iNum2);
    // alert(iNum);
    var onThree = document.getElementById('Num3');
    onThree.value = iNum;
    }
    document.getElementById('sub').onclick = function(){
    var iNum1 = document.getElementById('Num1').value;
    var iNum2 = document.getElementById('Num2').value;
    var iNum = parseInt(iNum1) - parseInt(iNum2);
    // alert(iNum);
    var onThree = document.getElementById('Num3');
    onThree.value = iNum;
    }
    document.getElementById('mul').onclick = function(){
    var iNum1 = document.getElementById('Num1').value;
    var iNum2 = document.getElementById('Num2').value;
    var iNum = parseInt(iNum1) * parseInt(iNum2);
    // alert(iNum);
    var onThree = document.getElementById('Num3');
    onThree.value = iNum;
    }
    document.getElementById('divi').onclick = function(){
    var iNum1 = document.getElementById('Num1').value;
    var iNum2 = document.getElementById('Num2').value;
    var iNum = parseInt(iNum1) / parseInt(iNum2);
    // alert(parseInt(iNum));
    var onThree = document.getElementById('Num3');
    onThree.value = iNum;
    }
    }
    </script>

    </head>
    <body>
    <!--输入框-->
    <input type="text" name="Num1" id="Num1" value="" />
    <input type="text" name="Num2" id="Num2" value="" />&nbsp;=
    <input type="text" name="num1" id="Num3" value="" />
    <br />
    <!--运算符-->
    <input type="button" name="add" id="add" value="+" />
    <input type="button" name="sub" id="sub" value="-" />
    <input type="button" name="mul" id="mul" value="*" />
    <input type="button" name="divi" id="divi" value="/" />
    </body>
    </html>

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  • 原文地址:https://www.cnblogs.com/rxl1003/p/6628447.html
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