function checkform(theform){
		if(theform.Signin_MemberName){
			if(theform.Signin_MemberName.value==""){
					alert("请填入用户名");
					theform.Signin_MemberName.focus();
					return false;
				}
			}
		if(theform.Signin_MemberPassword){
			if(theform.Signin_MemberPassword.value==""){
					alert("请填入登录密码");
					theform.Signin_MemberPassword.focus();
					return false;
				}
			}
		return true;
	}