function checkPwd_mail(){
	var username=$('username');var namemsg=$('namemsg');
	var email=$('email'); var emailmsg=$('emailmsg');
	if(username.value.length==0){
		namemsg.innerHTML="<img src='/image/unchecked.gif'/><font color='#800080'>用户名不能为空!</font>";
		return false;
	}else if(email.value.length==0){
		emailmsg.innerHTML="<img src='/image/unchecked.gif'/><font color='#800080'>E-mail地址不能为空!</font>";
		return false;
	}else if(!/(\S)+[@]{1}(\S)+[.]{1}(\w)+/.test(email.value)){
		emailmsg.innerHTML="<img src='/image/unchecked.gif'/><font color='#800080'>请输入有效的E-mail地址!</font>";
		return false;
	}else if(namemsg.innerText!=""){
		return false;
	}else
		return true;
}

//检查用户名是否存在
function isExists(){
	var username=$('username');
	if(username.value.length==0){
		$('namemsg').innerHTML="<img src='/image/unchecked.gif'/><font color='#800080'>用户名不能为空!</font>";
		return false;
	}else{
		UserInfo.getUserByUsername(username.value,collback);
	}
}

function collback(user){
	if(user!=null){
		$('namemsg').innerHTML="";
	}else{
		$('namemsg').innerHTML="<img src='/image/unchecked.gif'/><font color='#800080'>用户名不存在!</font>";
	}
}