javascript：从复选框来选中俩个数值,然后从单选框按钮来选择加减乘除运算符,实现简单的计算器.

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<!DOCTYPE html><html><head></head><body id="body" onload="init();"><input type="button" id="b" value="Plus" onclick="cal();" /><br><div id="result"></div><input type="radio" id="plus" name="plusandminus" value="plus"/><span>+</sapn><input type="radio" id="minus" name="plusandminus" value="minux"/><span>-</sapn><input type="radio" id="multiply" name="multiplyanddivide" value="multiply"/><span>*</sapn><input type="radio" id="divide" name="multiplyanddivide" value="divide"/><span>/</sapn><br><br><script type="text/javascript">function init() {for(i=0; i<100; i++) {checkBox=document.createElement("input");checkBox.setAttribute("type" , "checkbox");checkBox.setAttribute("id" , "cb"+i);checkBox.setAttribute("value" , i);body.appendChild(checkBox);span=document.createElement("span");span.innerHTML=i;body.appendChild(span);}}function cal() {if(document.getElementById("plus").checked) {sum = 0;for(i=0; i<100; i++) {cb = document.getElementById("cb"+i);if(cb.checked) {sum = parseInt(sum) + parseInt(cb.value);}}document.getElementById("result").innerHTML += sum + "  ";}if(document.getElementById("minus").checked) {sum = null;for(i=0; i<100; i++) {cb = document.getElementById("cb"+i);if(cb.checked) {if(sum == null) {sum = parseInt(cb.value);continue;}sum = parseInt(sum) - parseInt(cb.value);}}document.getElementById("result").innerHTML += sum;}if(document.getElementById("multiply").checked) {sum = 1;for(i=0; i<100; i++) {cb = document.getElementById("cb"+i);if(cb.checked) {sum = parseInt(sum) * parseInt(cb.value);}}document.getElementById("result").innerHTML += sum;}if(document.getElementById("divide").checked) {sum = null;for(i=0; i<100; i++) {cb = document.getElementById("cb"+i);if(cb.checked) {if(sum == null) {sum = parseInt(cb.value);continue;}sum = parseInt(sum) / parseInt(cb.value);}}document.getElementById("result").innerHTML += sum;}}</script></body></html>

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javascript：从 复选框来选中俩个数值,然后从单选框按钮来选择加减乘除运算符,实现简单的计算器.

javascript：从复选框来选中俩个数值,然后从单选框按钮来选择加减乘除运算符,实现简单的计算器.