function city(a1id)
{
	if(a1id==""||a1id==0)
	return;
	var url="/zixun/addressMenu.asp?id="+a1id;
		request.open("GET",url,false);
	var btype=getOs(); 
		if(btype!="Firefox"){
		request.onreadystatechange=updateCityMenu; 
		request.send(null); 
		request.onreadystatechange=updateCityMenu; 
		}
		else if(btype=="Firefox"){
		request.onreadystatechange=updateCityMenu(); 
		request.send(null); 
		request.onreadystatechange=updateCityMenu(); 
		}
		
	

}

function updateCityMenu()
{  
	if(request.readyState==4&&request.status==200)
	{
		
		document.all("addr2").options.length=1;
		var arryResults=unescape(request.responseText).split("|");
		if(arryResults[0]!="heike"&&arryResults[0]!="")
		{
			var arryLen=arryResults.length
			for(var i=0;i<arryLen;i++)
			{
				var arryVal=arryResults[i].split(",")
				document.all("addr2").options.add(new Option(arryVal[1],arryVal[0]));
			}
		}
		
	}
}

function getOs() 
{ 
var OsObject = ""; 
if(navigator.userAgent.indexOf("MSIE")>0) { 
return "MSIE"; //IEä¯ÀÀÆ÷ 
} 
if(isFirefox=navigator.userAgent.indexOf("Firefox")>0){ 
return "Firefox"; //Firefoxä¯ÀÀÆ÷ 
} 
if(isSafari=navigator.userAgent.indexOf("Safari")>0) { 
return "Safari"; //Safanä¯ÀÀÆ÷ 
} 
if(isCamino=navigator.userAgent.indexOf("Camino")>0){ 
return "Camino"; //Caminoä¯ÀÀÆ÷ 
} 
if(isMozilla=navigator.userAgent.indexOf("Gecko/")>0){ 
return "Gecko"; //Geckoä¯ÀÀÆ÷ 
} 
}