function check()
{
 if (register.username.value=="") {
		alert("用户名为空，请输入！");
		register.username.focus();		
		    return (false);
	}
	
 if (checkstring("用户名", document.register.username.value, false)) {
    document.register.username.focus();
    return false;   
    }
	
if (document.register.username.value.length<2) {
    alert("用户名不能少于两位！");
	register.username.focus();
    return false;   
  }
	




 if (register.password.value=="") {
		alert("密码为空，请输入密码！");
		register.password.focus();		
		    return (false);
	}
	
 if (checkstring("密码", document.register.password.value, false)) {
    document.register.password.focus();
    return false;   
    }
	
		
  if (document.register.password.value.length<2) {
    alert("密码不能少于两位！");
	register.password.focus();
    return false;   
  }


	


else
		 document.register.submit();
}