<!-- ↓温泉スクリプト -->
function change_s3(value){
	var s1Lnkurl = "http://onsen.nifty.com/cs/catalog/onsen_255/lst";
	var opParam =""
	opParam += "&s5=" + document.OnsenSeach.s5.value;
	opParam += "&s6=" + document.OnsenSeach.s6.value;
	opParam += "&s8=" + document.OnsenSeach.s8.value;
	opParam += "&s9=" + document.OnsenSeach.s9.value;
		
	if(value.length==0)
		location.href = "http://onsen.nifty.com/cs/catalog/onsen_255/lst" + "/1.htm?c1=2" + opParam;
	else{
		var values = value.split(",");
		var params = "";
		for(var i=0;i<values.length;i++){
			params += "/s1_"+values[i];
			if(values.length == 1){
				s1Lnkurl = s1Lnkurl.replace("srt_s1","srt_n1")
			}
		}
		location.href = s1Lnkurl + params + "/1.htm?c1=2" + opParam;
	}
}
<!-- ↑温泉スクリプト -->