/*
Javascript fundation function library
@aothor: liuliang
@version:1.0
*/

/*
	whether string is a valid mail address
	@param str input
	@return true if valid
*/
function isMail(str){
	var regExp = /^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/g;
	return (str.match(regExp) != null);
}
function trimString (str) {
  str = this != window? this : str;
  return str.replace(/^\s+/g, '').replace(/\s+$/g, '');
}
/*
	whether string is a valid mail address list, separate by "," or ";"
	@param str input string
	@return true if valid
*/
function isMailList(str){
	var sepRegExp = /\s*[,|;]\s*/g;
	var mails = str.split(sepRegExp);

	if(mails == null)
		return false;

	for(var i = 0; i < mails.length; i++){
		if(!isMail(mails[i]))
			return false;
	}

	return true;
}

/*
	whether string consist of number
	@param str input string
	@return true if valid
*/
function isNumber(str){
	var regExp = /^[0-9]+$/g;
	return (str.match(regExp) != null);
}


function isDigit(str){
	var _regExp = /^[0-9]$/g;
	return (str.match(_regExp) != null);
}

function isFloat(str){
	return isDouble(str);
}

function isDouble(str){
	var _regExp = /^[\+|-]?[0-9]+(\.[0-9]+)?$/g;
	return (str.match(_regExp) != null);
}

function isInteger(str){
	return isLong(str);
}

function isLong(str){
	var _regExp = /^[\+|-]?[0-9]+$/g;
	return (str.match(_regExp) != null);
}


function isDate(str)
{
	var _regExp = /^((19)|(20))[0-9]{2}-([0-9]|(0[0-9])|(1[0-2]))-([0-9]|([0-2][0-9])|([3][0-1]))$/g;
	return (str.match(_regExp) != null);
}


/*
	trim the blank space both head and tail.
	@param str input string
	@return string without blank space head and tail
*/
function trim(str){
	var regExp = /[^\s]+(\s+[^\s]+)*/;
	if(str == null)
		return str;

	var matchs = str.match(regExp);
	if(matchs != null)
		return matchs[0];

	return "";
}

/*
	whether string is null reference or empty string
	@param str input string
	@return true if valid
*/
function isNullOrEmpty(str){
	if(str == null){
		return true;
	}
	if(str.length == 0){
		return true;
	}
	return false;
}


function validateRequired(ctrl, msg){
	if(isNullOrEmpty(ctrl.value)){
		alert(msg + "不能為空");
		ctrl.focus();
		return false;
	}
	return true;
}

function validateMinLength(ctrl, msg, min){
	var value = ctrl.value;
	if(!isNullOrEmpty(value) && value.length < min){
		alert(msg + "的長度不能小于" + min);
		ctrl.focus();
		return false;
	}
	return true;
}

function validateMaxLength(ctrl, msg, max){
	var value = ctrl.value;
	if(!isNullOrEmpty(value) && value.length > max){
		alert(msg + "的長度不能大于" + x);
		ctrl.focus();
		return false;
	}
	return true;
}

function validateInteger(ctrl, msg){
	var value = ctrl.value;
	if(!isNullOrEmpty(value) && !isInteger(value)){
		alert(msg + "的值不是合法的整數(shù)");
		ctrl.focus();
		return false;
	}
	return true;
}

function validateLong(ctrl, msg){
	return validateInteger(ctrl, msg);
}


function validateFloat(ctrl, msg){
	var value = ctrl.value;
	if(!isNullOrEmpty(value) && !isFloat(value)){
		alert(msg + "的值不是合法的小數(shù)");
		ctrl.focus();
		return false;
	}
	return true;
}

function validateDouble(ctrl, msg){
	return validateFloat(ctrl, msg);
}

function validateDate(ctrl, msg){
	var value = ctrl.value;
	if(!isNullOrEmpty(value) && !isDate(value)){
		alert(msg + "不是合法的日期");
		ctrl.focus();
		return false;
	}
	return true;
}