<body></body>            
         
            
                           
        
            
               name1= [ "Gewerk1", "Gewerk2", "Gewerk3" ];               for(a=0;a<=2;a++){            document.getElementsByTagName('body')[0].innerHTML+='<label>'+name1[a]+'</label><input type="checkbox" name="'+name1[a]+'" id="'+name1[a]+'" value="'+name1[a]+'"><br>';        }            
         

External Javascript and CSS