var agent={
	browser:"",
	version:"",

	initialize:function(){
		var ua = navigator.userAgent;
		iest = ua.indexOf("MSIE");
		chst = ua.indexOf("Chrome");
		if(iest == -1) {
		  var nsst = ua.indexOf("Mozilla/",0);
		  var opst = ua.indexOf("Opera");
		  if (nsst!= -1){
			 agent.browser="Mozilla";
			 nsed = ua.indexOf(" ",nsst);
			 nsnum = Number(ua.substring(nsst+8,nsed));
			 agent.version=eval(nsnum);
		  } else if (opst!=-1){
			agent.browser="Opera";
		  }
		} else if(chst!=-1){
			agent.browser="Chrome";
		}  else {
			agent.browser="MSIE";
			ieed = ua.indexOf(";",iest);
			ienum = Number(ua.substring(iest+5,ieed));
			agent.version=eval(ienum);
		}

		switch(agent.browser){
			case "Mozilla":
			case "Chrome":
				var sc=document.getElementsByTagName("script");
				if(!sc.length) return false;
				for(var i=0,L=sc.length;i<L;i++){
					var srcVar=sc[i].getAttribute("src");
					if(!srcVar) continue;
					var reg=new RegExp(/^(.*)script.js$/);
					if(reg.exec(srcVar)==null) continue;
					var cssPath=(RegExp.$1).replace("common/js","common/css");
					break;
				}
				if(!cssPath) return false;
				
				document.write('<link rel="stylesheet" href="'+cssPath+'style_mozilla.css">');
				
				break;
			case "MSIE":
			case "Opera":
			default:
				
		}
	}
}
agent.initialize();