html中select的各种用法总结

1、html中select的各种用法总结1）select的躲藏和显示：$("selectlist").style.display=$("selectlist").style.display="block"?"none":"block"2）select可用不行用：document.getelementbyid("leveldroplist").disabled="val

2、ue"不行用document.getelementbyid("leveldroplist").disabled="value"可用calicotortiesiamesebmwporschemercedes宝马保时捷大奔附：一些select的技巧1.动态创建selectfunctioncreateselect()varmyselect=document.createelement("select");myselect.id="myselect&q

3、uot;document.body.appendchild(myselect);2.添加选项optionfunctionaddoption()/按照id查找对象，varobj=document.getelementbyid(&39;myselect&39;);/添加一个选项obj.add(newoption("文本","值");3.删除全部选项optionfunctionremoveall()varobj=document.getelementbyid(&39;myselect&39;);o

4、bj.options.length=0;4.删除一个选项optionfunctionremoveone()varobj=document.getelementbyid(&39;myselect&39;);/index,要删除选项的序号，这里取当前选中选项的序号varindex=obj.selectedindex;obj.options.remove(index);5.获得选项option的值varobj=document.getelementbyid(&39;myselect&39;);varindex=obj.selectedindex;/序号，取当前选中选项

5、的序号varval=obj.optionsindex.value;6.获得选项option的文本varobj=document.getelementbyid(&39;myselect&39;);varindex=obj.selectedindex;/序号，取当前选中选项的序号varval=obj.optionsindex.text;7.修改选项optionvarobj=document.getelementbyid(&39;myselect&39;);varindex=obj.selectedindex;/序号，取当前选中选项的序号varval=obj.opti

6、onsindex=newoption(&quot;新文本&quot;,&quot;新值&quot;);8.删除selectfunctionremoveselect()varmyselect=document.getelementbyid(&quot;myselect&quot;);myselect.parentnode.removechild(myselect);9.设置selectoptin被中functionremoveselect()/向办件人员下拉列表动态添加员工for(vari=0;i<json.length;i+)varnewoption=newoption(jsoni.empname,jsoni.empid,i);/向办件人员下拉列表添加员工信息objdeal.options.add(newoption);/客户业务员的id不为空if(empbydealempid!=&quot;&quot;|empbydealempid!=0)/员工id等于下拉列表中的值,则下拉列表被选