java script 脚本的简易计算器

来源：互联网发布：猜你喜欢人工智能编辑：程序博客网时间：2024/06/03 06:39
<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>简易计算器</title></head><body><table border="0" >  <tr><td colspan="3"><h3>简易计算器</h3></td>  </tr>  <tr>    <td>第一个数</td>    <td colspan="3"><input name="txtNum1" type="text"  id="txt1" size="25"/></td>  </tr>  <tr>    <td>第二个数</td>    <td colspan="3"><input name="txtNum2" type="text"  id="txt2" size="25"/></td>  </tr>  <tr>    <td><input name="addButton2" type="button" id="jia" value="  ＋  "  onclick="jisuan('+')" /></td>    <td><input name="subButton2" type="button" id="jian" value="  －  " onclick="jisuan('-')" /></td>    <td><input name="mulButton2" type="button" id="cheng" value="  ×  " onclick="jisuan('*')" /></td>    <td><input name="divButton2" type="button" id="chu" value="  ÷  "  onclick="jisuan('/')"/></td>  </tr>  <tr>    <td>计算结果</td>    <td colspan="3"><input name="txtresult" type="text"  id="txt3" size="25" /></td>  </tr></table><script type="text/javascript">function jisuan(x){  var a=Number(document.getElementById("txt1").value);   var b=Number(document.getElementById("txt2").value);   var c;   switch(x)   {  case "+": c=a+b;break;      case "-": c=a-b;break;  case "*": c=a*b;break;  case "/":if(b!=0) c=a/b;  else c="除数不能为0，请重新输入";  break;     }  document.getElementById("txt3").value=c;}</script></body>
1 0