function chk_submit(itm, itm_name ,prm) {
	chk_all = document.getElementsByClassName("chk_item");
	chk_cnt = 0;
	chk_arr = new Array();

	for( i = 0; i < chk_all.length; i++ ) {
		if( chk_all[i].checked ) {
			chk_arr.push( chk_all[i].value );
			chk_cnt++;
		}
	}
	if( chk_cnt == 0 ) {
		alert( itm_name + "を選択してください" );
		return false;
	}
	/*
	if( chk_cnt > 10 ) {
		alert( itm_name + "は10件まで選択できます" );
		return false;
	}
	*/

	if(document.next.action .substr(-5) == ".html"){
        kind = document.next.action.substring(document.next.action.lastIndexOf("/") + 4, document.next.action.lastIndexOf("/") + 5);
        document.next.action = document.next.action.substring(0, document.next.action.lastIndexOf("/") + 4);
        document.next.action += kind;
	}

	if (document.next.cities) {
		document.next.cities.value = chk_arr.join(",");
	}
	if (document.next.stations) {
		document.next.stations.value = chk_arr.join(",");
	} 
	//document.next.action += chk_arr.join("") + prm + ".html";
//	document.next.action += prm + ".html";
	document.next.submit();
	
	return false;
}