ajax判断用户名是否存在

来源：互联网发布：临床药物查询软件编辑：程序博客网时间：2024/06/05 06:11

$(function (){$("#txtEmail").blur(function(){var xhr;if(window.ActiveXObject){xhr=new ActiveXObject("Microsoft.XMLHTTP");}else{xhr=new XMLHttpRequest();}xhr.open("post","${pageContext.request.contextPath}/user/user_checkEmail");xhr.setRequestHeader("content-type","application/x-www-form-urlencoded");xhr.send("u.email="+$("#txtEmail").val());//滚动进度条出现$("#sig").attr("src","${pageContext.request.contextPath}/registerImg/load.gif").show();xhr.onreadystatechange=function(){if(xhr.readyState==4&&xhr.status==200){var ret=xhr.responseText;if("ok"==ret){//对勾显示$("#sig").attr("src","${pageContext.request.contextPath}/registerImg/ok.gif");}else{$("#sig").attr("src","${pageContext.request.contextPath}/registerImg/error.jpg");}}};});<tr>    <td valign="top" class="w1">请填写您的Email地址：</td><td><input name="u.email" type="text" id="txtEmail"     class="text_input" />     <img id="sig"  height="24px" width="24px"  style="display:none;margin-left:15px;padding:0 0 3px 0;vertical-align: bottom;"/><div class="text_left" id="emailValidMsg"><p>请填写有效的Email地址，在下一步中您将用此邮箱接收验证邮件。</p><span id="info" style="color:red"></span></div>    </td></tr>

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