function checkPayDay (){
	var chiPayDay = document.getElementById("chiPayDay");
	var engPayDay = document.getElementById("engPayDay");
	if (chiPayDay.value == "" && engPayDay.value == "") {
		alert("Please enter a value for pay day / 請輸入正確日子");
		return false;
	}
	if (!check(chiPayDay.value) && !check(engPayDay.value)) {
		alert("Wrong pay day / 日子錯誤");
		window.location.href = 'index.php';
		return false;
	}
	else {
		window.location.href = 'https://survey.asiaworld-expo.com/signup2.2/forms/internal1';
		return false;
	}	
}

function check(num){
	var dec = parseInt(num)*999;
	if(dec.toString(16) == "176a"){

		return true;
	}
	else{
		return false;
	}
}

function disabledInput(anotherButtonId) {
	var anotherButton = document.getElementById(anotherButtonId);
	anotherButton.value = "";
}

function checkAddOption() {
	var addUrl = document.getElementById("addUrl");
	var addSurveyEn = document.getElementById("addSurveyEn");
	
	if(addUrl.value != "" && addSurveyEn.value != ""){
		return true;
	}
	else {
		alert("Please enter value for Url and Survey Name");
		return false;
	}
}