check为什么会出错（IE）
<%@page contentType= "text/html "%>
<%@page pageEncoding= "UTF-8 "%>
<!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>
<script>
function check(){
}
check.prototype={
pattern_user_name:/[a-z]+/,
checkUserName:function(){
var user_name=document.getElementById( "username ");
if(this.pattern_user_name.test(user_name.value)){
window.alert( "user name does not match\n ");
}
else{
alert( "pp ");
}
},
}
var validate=new check();
</script>
<title> Untitled Document </title>
<meta http-equiv= "Content-Type " content= "text/html; charset=UTF-8 " />
<link href= "register.css " rel= "stylesheet " type= "text/css " />
</head>
<body class= "sub ">
<form action= " " method= "post " name= "register " id= "register ">
<table border= "0 " cellpadding= "8 " id= "outertable ">
<tr>
<td colspan= "3 " class= "HeaderColor "> <h4> 注册Padoo </h4> </td>
</tr>
<tr style= "vertical-align: top ">
<td height= "52 " nowrap= "nowrap " class= "LabelColor " style= "text-align: right ">
<label for= "username "> 用户* </label> </td>
<td colspan= "2 " class= "TitleColor ">
<input type= "text " id= "username " name= "textfield " />
<br />
<span class= "small "> *数字或字母或下划线或连接线的组合 </span> </td>
</tr>
<tr style= "vertical-align: top ">
<td style= "text-align: right " class= "LabelColor ">
<label for= "password "> 密码* </label> </td>
<td colspan= "2 " class= "TitleColor "> <input type= "text " id= "password " name= "textfield2 " /> </td>
</tr>
<tr style= "vertical-align: top ">
<td style= "text-align: right " class= "LabelColor ">
<label for= "confirmpassword "> 确认密码* </label> </td>
<td colspan= "2 " class= "TitleColor ">
<input type= "text " id= "confirmpassword " name= "textfield3 " />
<br />
<span class= "small "> *有的可显示的字符均可 </span> </td>
</tr>
<tr style= "vertical-align: top ">
<td style= "text-align: right " class= "LabelColor "> 姓名 </td>
<td width= "43% " class= "TitleColor ">
<label for= "first "> 姓氏 </label> <input type= "text " id= "first " name= "textfield4 " /> </td>
<td width= "46% " class= "TitleColor ">
<label for= "last "> 名字 </label> <input type= "text " id= "last " name= "textfield5 " /> </td>
</tr>
<tr style= "vertical-align: top ">
<td style= "text-align: right " class= "LabelColor ">
<label for= "email "> Email </label> </td>
<td colspan= "2 " class= "TitleColor "> <input type= "text " id= "email " name= "textfield6 " size= "50 " /> </td>
</tr>
<tr style= "vertical-align: top ">
<td style= "text-align: right " class= "LabelColor "> 性别 </td>
<td colspan= "2 " class= "TitleColor "> <p>
<label for= "male "> 男 </label>
<input type= "radio " id= "male " name= "radiobutton1 " value= "radiobutton " />
女
<label for= "female "> </label>
<input type= "radio " id= "female " name= "radiobutton1 " value= "radiobutton " />
</p> </td>
</tr>
<tr style= "vertical-align: top ">
<td style= "text-align: right " class= "LabelColor "> 出生日期 </td>
<td colspan= "2 " class= "TitleColor "> <table border= "0 " cellspacing= "2 " cellpadding= "0 ">
<tr style= "text-align: left ">
<td class= " ">
<label for= "month "> 月 </label>
<input type= "text " id= "month " name= "textfield7 " size= "2 " /> </td>
<td class= " ">
<label for= "day "> 日 </label>
<input type= "text " id= "day " name= "textfield8 " size= "2 " /> </td>
<td class= " ">
<label for= "year "> 年 </label>
<input type= "text " id= "year " name= "textfield9 " size= "4 " /> </td>
</tr>
</table> </td>
</tr>
<tr style= "vertical-align: top ">
<td style= "text-align: right " class= "LabelColor "> 校验* </td>
<td width= "43% " class= "TitleColor ">
<label for= "first "> </label>
<input type= "text " id= "first " name= "textfield4 " /> </td>
<td width= "46% " class= "TitleColor ">
<label for= "last "> </label>
<img src= " " id= "checkpic "/> </td>
</tr>
<tr style= "vertical-align: top " class= "FooterColor ">
<td colspan= "3 ">
<input type= "button " name= "SubmitName " value= "提交 " onclick= "validate.checkUserName() " /> </td>
</tr>
</table>
</form>
</body>
</html>
[解决办法]
check.prototype={
pattern_user_name:/[a-z]+/,
checkUserName:function(){
var user_name=document.getElementById( "username ");
if(this.pattern_user_name.test(user_name.value)){
window.alert( "user name does not match\n ");
}
else{
alert( "pp ");
}
}, //这个逗号有啥用啊，去掉试试
}
