function checkform(){
frm=document.myform;

myerror="";
if(!frm.lastname_j.value){myerror=myerror + "\n" + "姓(日本語)";}
if(!frm.firstname_j.value){myerror=myerror + "\n" + "名（日本語）";}
if(!checkradio("sex")){myerror=myerror + "\n" + "性別";} //radio box!
if(!frm.age.value){myerror=myerror + "\n" + "年齢層";}
if(!frm.p1.value){myerror=myerror + "\n" + "郵便番号";}
if(!checkselect("pref")){myerror=myerror + "\n" + "都道府県";} //select box!
if(!frm.address.value){myerror=myerror + "\n" + "ご住所";}
if(!frm.phone.value){myerror=myerror + "\n" + "電話番号";}
if(!frm.email.value){myerror=myerror + "\n" + "メールアドレス";}
if(!checkradio("country")){myerror=myerror + "\n" + "留学予定国";} //radio box!
if(!frm.enter_y.value){myerror=myerror + "\n" + "留学時期-年";}
if(!frm.enter_m.value){myerror=myerror + "\n" + "留学時期-月";}
if(!checkselect("kikan")){myerror=myerror + "\n" + "留学期間";} //select box!
if(!checkradio("visa")){myerror=myerror + "\n" + "ご予定のビザ";} //radio box!
if(myerror){myerror="下記項目が入力されていません\n"+myerror+"\n\nご入力後、次へボタンを押して下さい。";}
if(myerror){alert(myerror);return false;}
return true;
}

function checkradio(myradio){
frm=document.myform;
iserror=1;
	for(i=0;i<frm[myradio].length;i++){
	if(frm[myradio][i].checked){iserror=0;}
	}
if(iserror==0){return true;}
return false;
}