function checkuser(){
    if(getBytesLength(trim(document.getElementById("gameusername").value))<3){
    	alert("會員帳號輸入有誤");
		document.getElementById("gameusername").focus();
		return false;
	}
	  if(trim(document.getElementById("gameuserpassword").value)==""){
	    //document.getElementById("gameuserpassword").value = "密碼不能空";
	    //document.getElementById("errorinfo").innerHTML="<font color='red'>密碼不能空.</font>";
	    alert("會員密碼輸入有誤");
		document.getElementById("gameuserpassword").focus();
		return false;
	}
	 if(getBytesLength(trim(document.getElementById("verifyNo").value))!=4){
	     alert("驗證碼輸入有誤");
		document.getElementById("verifyNo").focus();
		return false;
	}
	return true;
}