js操作ListBox实现多项的添加和删除

//添加多个项到另一个ListBox中去function add(res,sel){var objres=document.getElementById(res);var objsel=document.getElementById(sel);var customOptions;for(var i=0;i<objres.options.length;i++){if(objres.options[i].selected){customOptions = document.createElement("OPTION");customOptions.text=objres.options[i].text.replace(/├/g,"").replace(/　/g,"");customOptions.value=objres.options[i].value;objsel.add(customOptions,0);}}return false;}

 

//删除多个function del(dels){var objdel=document.getElementById(dels);for(var i=objdel.options.length-1;i>=0;i--){if(objdel.options[i].selected){objdel.remove(i);}}}