<!DOCTYPE html> <html lang="zh"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <meta http-equiv="X-UA-Compatible" content="ie=edge" /> <title>Document</title> </head> <body> Name:<input type="text" name="" id="" value="" onblur="check(this)"/><font></font> </body> <script type="text/javascript"> function check(obj){ //alert(obj); //获取Input输入的值 var name = obj.value; var ajax = new XMLHttpRequest(); ajax.open('get','./get.php?name='+name,true); ajax.send(); ajax.onreadystatechange = function(){ if(ajax.readyState == 4 && ajax.status ==200){ var result = ajax.responseText; if(result == 0){ obj.nextSibling.innerHTML = '<img src="./cou.png">已经注册'; obj.nextSibling.color = 'red'; }else{ obj.nextSibling.innerHTML ='<img src="./dui.png">'; obj.nextSibling.color = 'green'; } } } } </script> </html>
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