AJAX实现计算器

时间:2023-01-09 22:24:39

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>calc_AJAX.html</title>
 <script type="text/javascript">
 function loadXMLDoc(number1,number2)
 {
 var xmlhttp;
 if (window.XMLHttpRequest)
   {// code for IE7+, Firefox, Chrome, Opera, Safari
   xmlhttp=new XMLHttpRequest();
   }
 else
   {// code for IE6, IE5
   xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
   }

   xmlhttp.onreadystatechange=function()
   {
   if (xmlhttp.readyState==4 && xmlhttp.status==200)
  {
  document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
  }
   }

    var url="calc_AJAX_GET.php?num1="+number1+"&num2="+number2; //请求字符串
 xmlhttp.open("GET",url,true);
 xmlhttp.send();
 }
 </script>
</head>
<body>


 

<form method="post" action="">
计算器<br>
数值1:<input type="text" id="num1" value="3"> <br>
数值2:<input type="text" id="num2" value="2"> <br>
<br>
<button type="button" name="add" value="+" onclick="loadXMLDoc(document.getElementById('num1').value, document.getElementById('num2').value)">+ </button>
<br>
结果:<br>
<div id="myDiv"><h3>Let AJAX change this text</h3></div>
</form>
</body>
</html>


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
    <title>calc_AJAX_GET.php</title>
    <meta charset="UTF-8">
 </head>

 <body>
      <?php
    $sum="";
   $num1=isset($_GET['num1']) ? $_GET['num1'] : "";
   $num2=isset($_GET['num2']) ? $_GET['num2'] : "";

if(is_numeric($num1) && is_numeric($num2)){
    $sum=$num1+$num2;
}else{

    echo "请输入有效数值";
 exit(0);

}
echo $sum;
?>
 </body>
</html>