function chkNensikiOver20(obj) {
	var frm = document.form1;
	if (obj.checked) {
		var n = getComboValue(frm.s_my1, "2008");
		frm.s_my1.options[n].selected = true;
		frm.s_my2.options[0].selected = true;
	} else {
		frm.s_my1.options[0].selected = true;
		frm.s_my2.options[0].selected = true;
	}
}

function chkKyoriUnder3(obj) {
	var frm = document.form1;
	if (obj.checked) {
		frm.s_mi1.options[0].selected = true;
		var n = getComboValue(frm.s_mi2, "30000");
		frm.s_mi2.options[n].selected = true;
	} else {
		frm.s_mi1.options[0].selected = true;
		frm.s_mi2.options[0].selected = true;
	}
}

function chngCmbNensiki() {
	var frm = document.form1;
	frm.e_nensiki_over20.checked = false;
}

function chngCmbKyori() {
	var frm = document.form1;
	frm.e_kyori_under3.checked = false;
}

function getComboValue(obj,val){
	var ret = 0;
	var cnt = obj.options.length;
	if(val != ""){
		for(var i = 0; i < cnt; i++){
			if(obj.options[i].value == val){
				ret = i;
				break;
			}
		}
	}else{
		for(var i = 0; i < cnt; i++){
			if(obj.options[i].defaultSelected){
				ret = i;
				break;
			}
		}
	}
	return ret;
}