function getAvatar(authorEmail) {//获得头像代码封装函数
 var nowtime = Math.round(new Date().getTime() / 1000);
 $.get(apiurl, {
 action : "get_avatar",
 email : authorEmail,
 t : nowtime
 }, function(data) {
 $('#get-avatar-img').fadeOut('slow', function() {
 $('#get-avatar-img').html(data).fadeIn();
 })
 });
 }
 
 var avatarhtml = '<div id="get-avatar-img" style="display:none;">';
 avatarhtml += '</div>';
 $('#respond').append(avatarhtml);//添加头像HTML
 if($('#email').val().length > 1)
 getAvatar($('#email').val());//获得邮箱地址
 $('#email').focusout(function() {//email输入框失去焦点绑定的动作
 var authorEmail = $('#email').val();
 var pattern = /^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/;
 var flag = pattern.test(authorEmail);
 if(flag) {
 $('#get-avatar-img').html('载入头像中').fadeIn('fast');
 getAvatar(authorEmail);
 } else {
 alert('请输入正确邮箱地址');
 }
 })

 $action = isset($_REQUEST['action']) ? $_REQUEST['action'] : false ;
 
if($action){//留下以后添加功能的空间，你懂的。
 switch ($action) {
 case 'get_avatar':
 $email = isset($_REQUEST['email']) ? $_REQUEST['email']: false ;
 if($email){
 echo get_avatar($email,60);
 }
 break;
 
 default:
 echo "请求内容不充分";
 break;
 }
 }