function mailChecker(mf){
	var flag = 0;
	if(!mf.name.value){
		var flag = 1;
		document.getElementById('nameError').style.display = "inline";
	}else{
		document.getElementById('nameError').style.display = "none";
	}
	if(!mf.kana.value){
		var flag = 1;
		document.getElementById('kanaError').style.display = "inline";
	}else{
		document.getElementById('kanaError').style.display = "none";
	}
	if(!mf.email.value){
		var flag = 1;
		document.getElementById('emailError').style.display = "inline";
	}else{
		document.getElementById('emailError').style.display = "none";
	}
	if(!mf.text.value){
		var flag = 1;
		document.getElementById('textError').style.display = "inline";
	}else{
		document.getElementById('textError').style.display = "none";
	}

	if(flag != 1) mf.submit();
}