function check() {
	
	var error=0;
	var focuspt='';
	if ($('#lang').val()=='eng') {
		var name1_msg = 'Please fill in your lastname';
		var name2_msg = 'Please fill in your firstname';
		var comname_msg = 'Please fill in your company name';
		var industry_msg = 'Please fill in the industry of your company';
		var d_address_msg = 'Please fill in the detail address of your company';
		var number_msg = 'Please fill in the contact number';
		var number_msg2 = 'The format of your contact number is not correct';
		var email_msg = 'Please fill in your email';
		var email_msg2 = 'The format of your email is not correct';
	} else {
		var name1_msg = '請填上姓氏';
		var name2_msg = '請填上名字';
		var comname_msg = '請填上公司名稱';
		var industry_msg = '請填上行業';
		var d_address_msg = '請填上地址';
		var number_msg = '請填上';
		var number_msg2 = '電話號碼格式不正確';
		var email_msg = '請填上';
		var email_msg2 = '電郵地址格式不正確';
	}
	
	if (!$('#name1').val()) {
		$('#name1').focus();
		alert(name1_msg);
		return false;
	}
	
	if ($('#name2').val() == "") {
		$('#name2').focus();
		alert(name2_msg);
		return false;
	}
	
	if ($('#comname').val() == "") {
		$('#comname').focus();
		alert(comname_msg);
		return false;
	}
	
	if ($('#industry').val() == "") {
		$('#industry').focus();
		alert(industry_msg);
		return false;
	}
	
	if ($('#d-address').val() == "") {
		$('#d-address').focus();
		alert(d_address_msg);
		return false;
	}
	
	if ($('#number').val() == "") {
		$('#number').focus();
		alert(number_msg);
		return false;
	}
	
	if (!isNumeric($('#number').val())) {
		$('#number').focus();
		alert(number_msg2);
		return false;
	}
	
	if ($('#email').val() == "") {
		$('#email').focus();
		alert(email_msg);
		return false;
	}
	
	if (!isEmail($('#email').val())) {
		$('#email').focus();
		alert(email_msg2);
		return false;
	}
	
	//alert($('#submit-btn').val());
	//document.enquiryform.submit();
	$('#submit-btn').trigger('click');
	return true;
}

function isNumeric(s) {
	var strValidChars = "0123456789+- ";
	var strChar;
	var blnResult = true;
	if (s.length == 0) return false;

	//  test strString consists of valid characters listed above
	for (i = 0; i < s.length && blnResult == true; i++) {
		strChar = s.charAt(i);
		if (strValidChars.indexOf(strChar) == -1) {
			blnResult = false;
		}
	}
	return blnResult;
}

function nonSymbol(s) {
	var strValidChars = "!@#$%^&*()+|\={}][:';/.,<>?";
	var strChar;
	var blnResult = true;

	if (s.length == 0) return false;

	//  test strString consists of valid characters listed above
	for (i = 0; i < s.length && blnResult == true; i++) {
		strChar = s.charAt(i);
		if (strValidChars.indexOf(strChar) == -1) {
			blnResult = false;
		}
	}
	return blnResult;
}

function isEmail (s) {	
    var i = 1;
    var sLength = s.length;
   
    // 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;
}