<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<style type="text/css">
.txtbackcolor
{
background-color:#eee;
}
</style>
<script src="jquery-1.9.1.js" type="text/javascript"></script>
<script type="text/javascript">
$(function () {
var state = false;
$('#txtEmail').focus(function () {
if (state == false) {
$(this).val('');
}
})
$('#txtEmail').blur(function () {
if ($(this).val() == '') {
$('#spinfo').text('邮箱不能为空');
$(this).focus();
}
else {
if (/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/.test($(this).val()) == false) {
$('#spinfo').text('邮箱格式不正确，请重新输入');
$(this).focus();
}
else {
$('#spinfo').text('');
$('#spinfo').append('<img src=images/onSuccess.gif/>');
state = true;
}
}
})
})
</script>
</head>
<body>
邮箱<input type="text" id="txtEmail" value="输入邮箱" class="txtbackcolor" /><span id="spinfo"></span><br />
电话<input type="text" id="txtPhone" />
</body>
</html>