使用js给select添加option(兼容IE/Firefox)

 

while (obj.selectedIndex > -1){   
         mot = obj.options[obj.selectedIndex].text;   
         mov = obj.options[obj.selectedIndex].value;   
         obj.remove(obj.selectedIndex);   
         var newoption = document.createElement("OPTION");   
         newoption.text = mot;   
         newoption.value = mov;   
         if(Sys.ie) target.add(newoption);   
         if(Sys.firefox) target.appendChild(newoption);   
}