// -----------------------------------------------
// 说明: 该文件中函数主要用于判断各个对象中返回值的合法性
// -----------------------------------------------

// 根据给定的对象和语句来得到返回值, 并作出相应提示
function CheckValid(exp1, exp2, fCtrlName, retValue) {
	var fCtrlobj = document.getElementById(fCtrlName);
	var expression = "";
        
	//if (fCtrlobj == null || fCtrlobj.value =="") return !retValue;
	if (fCtrlobj == null) return !retValue;
	if (!(fCtrlobj.length > 1)) {
		expression = exp1 + ReplaceValue(fCtrlobj.value) + exp2;
		if (eval(expression)) {
		    //fCtrlobj.select();
			return retValue;
		}
	}
	return !retValue;
}

function ReplaceValue(strValue)
{
   var str = strValue;
   str = str.replace(/\r/g, "");
   str = str.replace(/\n/g, "");
   str = str.replace(/\\/g, "\\\\");
   str = str.replace(/'/g, "\\\'");
   return str;
}

// 检查是否为空, 是则提醒
function IsEmpty(fData) {
    return ((fData==null) || (fData.length==0));
}
function CheckEmpty(fCtrlName, fAlertStr) {
	return CheckValid("IsEmpty('", "')", fCtrlName, fAlertStr, false);
}

// 检查是否为数字, 否则提醒
function IsDigit(fData) {
	return ((fData>="0") && (fData<="9"));
}
function CheckDigit(fCtrlName, fAlertStr) {
	return CheckValid("!IsDigit('", "')", fCtrlName, fAlertStr, false);
}

// 检查字符串长度是否超过指定长度, 是则提醒
function DataLength(fData) {
    var intLength = 0;
    for (var i=0; i<fData.length; i++) {
		if ((fData.charCodeAt(i) < 0) || (fData.charCodeAt(i) > 255))
			intLength += 2;
        else
            intLength ++;
    }
    return intLength;
}
function CheckDataLength(fCtrlName, fAlertStr, MaxLength) {
	return CheckValid("DataLength('", "')>"+MaxLength, fCtrlName, fAlertStr, false);
}

function CheckFixLength(fCtrlName, fAlertStr, MaxLength) {
	return CheckValid("DataLength('", "')!="+MaxLength, fCtrlName, fAlertStr, false);
}

// 检查是否为整型数字, 否则提醒
function IsInteger(fData) {
	if (IsEmpty(fData))
		return true;
	if ((isNaN(fData)) || (fData.indexOf(".")!=-1) || (fData.indexOf("-")!=-1))
		return false;
	return true;
}
function CheckInteger(fCtrlName) {
	return CheckValid("!IsInteger('", "')", fCtrlName ,false);
}

// 检查是否为合法Email, 否则提醒
function IsEmail(fData) {
	if (IsEmpty(fData))
		return true;
	if (fData.indexOf("@")==-1)
		return false;
	return true;
}
function CheckEmail(fCtrlName, fAlertStr) {
	return CheckValid("!IsEmail('", "')", fCtrlName, fAlertStr, false);
}

// 检查是否为正值, 否则提醒
function IsPlusNumeric(fData) {
	if (IsEmpty(fData))
		return true;
	if ((isNaN(fData)) || (fData.indexOf("-")!=-1))
		return false;
	return true;
}
function CheckPlusNumeric(fCtrlName, fAlertStr) {
	return CheckValid("!IsPlusNumeric('", "')", fCtrlName, fAlertStr, false);
}

// 检查是否为数值, 否则提醒
function IsNumeric(fData) {
	if (IsEmpty(fData))
		return true;
	if (isNaN(fData))
		return false;
	return true;
}
function CheckNumeric(fCtrlName, fAlertStr) {
	return CheckValid("!IsNumeric('", "')", fCtrlName, fAlertStr, false);
}

// 检查是否为指定范围内的数值, 否则提醒
function IsNumericInRange(fInput,fLower,fHigh) {
	if (!IsNumeric(fInput))
		return false;
	if (fLower == null)
		return (fInput <= fHigh);
	else if (fHigh == null)
		return (fInput >= fLower);
	else
		return ((fInput >= fLower) && (fInput <= fHigh));
}
function CheckNumericInRange(fCtrlName, fAlertStr, fLower, fHigh){
	return CheckValid("!IsNumericInRange(", ","+fLower+","+fHigh+")", fCtrlName, fAlertStr, false);
}

// 检查是否为有效日期, 否则提醒
function IsDate(fDate) {
    if (IsEmpty(fDate))
        return true;
	if (vbIsDate(fDate))
		return true;
	return false;
}
function CheckDate(fCtrlName, fAlertStr) {
	return CheckValid("!IsDate('", "')", fCtrlName, fAlertStr, false);
}



//除去字符串前后空格
String.prototype.trim=function() 
{ 
	return this.replace(/(\s*$)|(^\s*)/g, ''); 
}
//按正则表达式检查
function RegExpValid(fCtrlID,regExpStr,msgID,msgValidCss,validMsg,msgErrorCss,errorMsg)
{
	var objRegExp = new RegExp(regExpStr,"g");
	var objCtrlID=document.getElementById(fCtrlID);	
	var isValid=objRegExp.test(objCtrlID.value);
	MsgShow(isValid,msgID,msgValidCss,validMsg,msgErrorCss,errorMsg);
	return isValid;
}

//比较输入是否一致
function CompareFieldValid(fCtrlID1,fCtrlID2,msgID,msgValidCss,validMsg,msgErrorCss,errorMsg)
{
    var objCtrlID1=document.getElementById(fCtrlID1);
    var objCtrlID2=document.getElementById(fCtrlID2);
    var isValid = (objCtrlID1.value.trim()==objCtrlID2.value.trim());
    MsgShow(isValid,msgID,msgValidCss,validMsg,msgErrorCss,errorMsg);
    return isValid;
}

//是否选中checkbox
function CheckOn(fCtrlID,isTrue,msgID,msgValidCss,validMsg,msgErrorCss,errorMsg)
{
    var objCtrlID1=document.getElementById(fCtrlID);
    var isValid;
    if(isTrue)
         isValid = objCtrlID1.checked;
    else
    {
        isValid = !objCtrlID1.checked;
    }
    MsgShow(isValid,msgID,msgValidCss,validMsg,msgErrorCss,errorMsg);
    return isValid;
}
//div样式及提示信息显示
function MsgShow(isValid,msgID,msgValidCss,validMsg,msgErrorCss,errorMsg)
{
    var objMsg=document.getElementById(msgID);
    if(!isValid)
	{
	    objMsg.innerHTML = errorMsg;
	    objMsg.className = msgErrorCss;
	    objMsg.style.display="block";
	}
	else
	{
	    objMsg.innerHTML = validMsg;
	    objMsg.className = msgValidCss;
	    objMsg.style.display="block";
	}
}