function validate(formEmt, requiredFields){
	var invalidFields = 0;

	for(var i = 0; i < requiredFields.length; i++){
		var input = document.getElementById(requiredFields[i]);
		if(input.value == ""){
			invalidFields++;
		}
	}
	
	if(invalidFields > 0){
		alert("Täytäthän kaikki pakolliset kentät.")
		return false;
	}
	else{
		return true;
	}
}

function arraySearch(haystack, needle){
	var found = 0;
	
	for(var i = 0; i < haystack.length; i++){
		if(haystack[i] == needle){
			found++;
		}
	}
	
	if(found > 0){
		return true;
	}
	else{
		return false;
	}
}