JS添加,删除select

转载于： http://blog.sina.com.cn/s/blog_4e46752f0100qujv.html

1.动态创建select    function createSelect(){        var mySelect = document.createElement_x("select");        mySelect.id = "mySelect";          document.body.appendChild(mySelect);    }2.添加选项option   function addOption(){        //根据id查找对象，         var obj=document.getElementByIdx_x('mySelect');         //添加一个选项         obj.add(new    Option("文本","值"));      }3.删除所有选项option   function removeAll(){         var obj=document.getElementByIdx_x('mySelect');           obj.options.length=0;     }4.删除一个选项optionfunction removeOne(){         var obj=document.getElementByIdx_x('mySelect');         //index,要删除选项的序号，这里取当前选中选项的序号         var index=obj.selectedIndex;         obj.options.remove(index);     }5.获得选项option的值var obj=document.getElementByIdx_x('mySelect');var index=obj.selectedIndex; //序号，取当前选中选项的序号var val = obj.options[index].value;6.获得选项option的文本var obj=document.getElementByIdx_x('mySelect');var index=obj.selectedIndex; //序号，取当前选中选项的序号var val = obj.options[index].text;7.修改选项optionvar obj=document.getElementByIdx_x('mySelect');var index=obj.selectedIndex; //序号，取当前选中选项的序号var val = obj.options[index]=new Option("新文本","新值");8.删除select    function removeSelect(){          var mySelect = document.getElementByIdx_x("mySelect");         mySelect.parentNode.removeChild(mySelect);   }

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