function getBrowser() {    
    var ua = window.navigator.userAgent;    
    var isIE = window.ActiveXObject != undefined && ua.indexOf("MSIE") != -1;    
    var isFirefox = ua.indexOf("Firefox") != -1;    
    var isOpera = window.opr != undefined;    
    var isChrome = ua.indexOf("Chrome") && window.chrome;    
    var isSafari = ua.indexOf("Safari") != -1 && ua.indexOf("Version") != -1;    
    if (isIE) {    
        return "IE";    
    } else if (isFirefox) {    
        return "Firefox";    
    } else if (isOpera) {    
        return "Opera";    
    } else if (isChrome) {    
        return "Chrome";    
    } else if (isSafari) {    
        return "Safari";    
    } else {    
        return "Unkown";    
    }    
}  
  
var linkNode = document.createElement("link");  
linkNode.setAttribute("rel","stylesheet");  
linkNode.setAttribute("type","text/css");  
 
  
if(getBrowser()=="IE"){  
    linkNode.setAttribute("href","/app/home/view/szwjs/public/css/ie.css");  
   
}else if(getBrowser()=="Firefox"){  

}else if(getBrowser()=="Opera"){  
    
}else if(getBrowser()=="Chrome"){  
     
}else if(getBrowser()=="Safari"){  
    
}else if(getBrowser()=="Unkown"){
   linkNode.setAttribute("href","/app/home/view/szwjs/public/css/ie.css"); 
}  
document.head.appendChild(linkNode);