load js and css

loader.js

function asyncLoader (s, cb) {
    var d  = document                                                                                                    
    ,   h  = document.getElementsByTagName('head')[0]                                                                    
    ,   b  = (Math.random()*1e8>>0)                                                                                      
    ,   i  = 'loader_'+b                                                                                                 
    ,   t  = (/\.js$/.test(s)) ? "js" : "css"                                                                            
    ,   j  = (t === 'js') ? d.createElement('script') : d.createElement('link');                                         

    j.id = i;                                                                                                            

    if(t === "js"){                                                                                                      
        j.src = s+'?'+'b='+b;                                                                                            
        h.appendChild(j);                                                                                                

        j.onload = j.onreadystatechange = function() {                                                                   
            var r = this.readyState;                                                                                     
            if ((!r || r == "loaded" || r == "complete")) {                                                              
                // Handle memory leak in IE                                                                              
                j.onload = j.onreadystatechange = null;                                                                  
                h.removeChild( j );                                                                                      
                cb && typeof cb === 'function' && cb();                                                                  
            }                                                                                                            
        };                                                                                                               
    } else {                                                                                                             
        j.setAttribute("rel", "stylesheet");                                                                             
        j.setAttribute("type", "text/css");                                                                              
        j.setAttribute("href", s+'?'+'b='+b);                                                                            
        h.appendChild(j);                                                                                                

        //-- need poller here                                                                                            
        cb && typeof cb === 'function' && cb();                                                                          
    }                                                                                                                    
};