function input_check(){

//お名前
if(!Is_Null(document.form.name.value)){
	alert("Please enter Your Name.");
	document.form.name.focus();
	return false;
};

//メールアドレス
if(!Is_Null(document.form.mail.value)){
	alert("Please enter E-mail Address.");
	document.form.mail.focus();
	return false;
};

//電話番号
if(!Is_Null(document.form.tel.value)){
	alert("Please enter Phone.");
	document.form.tel.focus();
	return false;
};

//fax番号
if(!Is_Null(document.form.fax.value)){
	alert("Please enter Fax.");
	document.form.fax.focus();
	return false;
};

//会社名
if(!Is_Null(document.form.company.value)){
	alert("Please enter Company Name.");
	document.form.company.focus();
	return false;
};

//国
if(!Is_Null(document.form.country.value)){
	alert("Please enter Country.");
	document.form.country.focus();
	return false;
};

//住所
if(!Is_Null(document.form.address.value)){
	alert("Please enter Mailing Address.");
	document.form.address.focus();
	return false;
};

//ご意見・ご質問
if(!Is_Null(document.form.contact.value)){
	alert("Please enter Your Message.");
	document.form.contact.focus();
	return false;
};

return true;

}