function trim(inputString) {
// **** Remove leading and trailing spaces ****

	//Make sure input is string, otherwise return input
	if (typeof inputString != "string") {
		return inputString;
	}

	var retValue = inputString;
	var ch = retValue.substring(0, 1);

	while (ch == " ") {
	//Check for leading spaces and remove
	retValue = retValue.substring(1, retValue.length);
	ch = retValue.substring(0, 1);
	}

	ch = retValue.substring(retValue.length-1, retValue.length);
	while (ch == " ") {
	//Check for trailing spaces and remove
	retValue = retValue.substring(0, retValue.length-1);
	ch = retValue.substring(retValue.length-1, retValue.length);
	}

	return retValue;
}


function isEmail (s)
{
    if (typeof s != "string") {
	return false;
	}

    // there must be >= 1 character before @, so we
    // start looking at character position 1
    // (i.e. second character)
    var i = 1;
    var sLength = s.length;

    //don't even bother if string is less than 4 chars ("a@b.c".length=5)
    if (!sLength > 4){
	return false;
	}

    // look for @
    while ((i < sLength) && (s.charAt(i) != "@"))
    {
	i++
    }

    if ((i >= sLength) || (s.charAt(i) != "@")) return false;
    else i += 2;

    // look for .
    while ((i < sLength) && (s.charAt(i) != "."))
    { i++
    }

    // there must be at least one character after the .
    if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
    else return true;
}

function ChkData(){

	allOk=true;
	// Name Validation 
	if (trim(document.regForm.name.value).length == 0 && allOk) 
	{
		alert("Please enter your name");
		document.regForm.name.focus();
		allOk = false;
//		return allOk;
	} else {
	
		// **** Email validation ****
		if (trim(document.regForm.email.value).length == 0 && allOk)
		{
			alert("Please enter email address");
			document.regForm.email.focus();
			allOk = false;
	//		return allOk;
		} else {
			if (!isEmail(document.regForm.email.value)) {
				alert("Email address is invalid");
				document.regForm.email.focus();
				allOk = false;
	//			return allOk;			
			}		
		}
	}		
	if (allOk){
		document.regForm.submit();	
//      		return true;
	}

}
function ChkDataTC(){

	allOk=true;
	// Name Validation 
	if (trim(document.regForm.name.value).length == 0 && allOk) 
	{
		alert("請輸入您的姓名");
		document.regForm.name.focus();
		allOk = false;
//		return allOk;
	} else {
		
		// **** Email validation ****
		if (trim(document.regForm.email.value).length == 0 && allOk)
		{
			alert("請輸入您的電郵地址");
			document.regForm.email.focus();
			allOk = false;
	//		return allOk;
		} else {
			if (!isEmail(document.regForm.email.value)) {
				alert("請檢查您的電郵地址是否正確");
				document.regForm.email.focus();
				allOk = false;
	//			return allOk;			
			}		
		}
	}
	
	if (allOk){
		document.regForm.submit();
//		return true;
	}
	
}

function ChkDataSC(){

	allOk=true;
	// Name Validation 
	if (trim(document.regForm.name.value).length == 0 && allOk) 
	{
		alert("请输入您的姓名");
		document.regForm.name.focus();
		allOk = false;
//		return allOk;
	} else {
	
		// **** Email validation ****
		if (trim(document.regForm.email.value).length == 0 && allOk)
		{
			alert("请输入您的电邮地址");
			document.regForm.email.focus();
			allOk = false;
	//		return allOk;
		} else {
			if (!isEmail(document.regForm.email.value)) {
				alert("请检查您的电邮地址是否正确");
				document.regForm.email.focus();
				allOk = false;
	//			return allOk;			
			}		
		}
	}
	
	if (allOk){
		document.regForm.submit();
//   		return true;
	}
	
}



function getCheckedValue(radioObj) {
	if(!radioObj)
		return "";
	var radioLength = radioObj.length;
	if(radioLength == undefined)
		if(radioObj.checked)
			return radioObj.value;
		else
			return "";
	for(var i = 0; i < radioLength; i++) {
		if(radioObj[i].checked) {
			return radioObj[i].value;
		}
	}
	return "";
}