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源代码:
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <script> function showCustomer(str) { var xmlhttp; if (str=="") { document.getElementById("txtHint").innerHTML=""; return; } if (window.XMLHttpRequest) { // IE7+, Firefox, Chrome, Opera, Safari 浏览器执行代码 xmlhttp=new XMLHttpRequest(); } else { // IE6, IE5 浏览器执行代码 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange=function() { if (xmlhttp.readyState==4 && xmlhttp.status==200) { document.getElementById("txtHint").innerHTML=xmlhttp.responseText; } } xmlhttp.open("GET","/try/ajax/getcustomer.php?q="+str,true); xmlhttp.send(); } </script> </head> <body> <form action=""> <select name="customers" onchange="showCustomer(this.value)" style="font-family:Verdana, Arial, Helvetica, sans-serif;"> <option value="APPLE">Apple Computer, Inc.</option> <option value="BAIDU ">BAIDU, Inc</option> <option value="Canon">Canon USA, Inc.</option> <option value="Google">Google, Inc.</option> <option value="Nokia">Nokia Corporation</option> <option value="SONY">Sony Corporation of America</option> </select> </form> <br> <div id="txtHint">客户信息将显示在这...</div> </body> </html>
运行结果