function param_check(){
	var linechk=false;
	var bknchk=false;

	if (document.frm_search_rr.elements['sch_linecd[]'].length) {
		for(i = 0; i < document.frm_search_rr.elements['sch_linecd[]'].length; i++){
			if(document.frm_search_rr.elements['sch_linecd[]'][i].checked){
				linechk=true;
				break;
			}
		}
	} else {
		if(document.frm_search_rr.elements['sch_linecd[]'].checked){ linechk=true; }
	}
	if(linechk!=true){
		alert("沿線を指定してください。");
		return;
	}

	document.frm_search_rr.submit();
}