html中select的各種用法總結(jié)

1、html中select的各種用法總結(jié)1）select的躲藏和顯示：$("selectlist").style.display=$("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寶馬保時(shí)捷大奔附：一些select的技巧1.動(dòng)態(tài)創(chuàng)建selectfunctioncreateselect()varmyselect=document.createelement("select");myselect.id="myselect&q

3、uot;document.body.appendchild(myselect);2.添加選項(xiàng)optionfunctionaddoption()/按照id查找對(duì)象，varobj=document.getelementbyid(&39;myselect&39;);/添加一個(gè)選項(xiàng)obj.add(newoption("文本","值");3.刪除全部選項(xiàng)optionfunctionremoveall()varobj=document.getelementbyid(&39;myselect&39;);o

4、bj.options.length=0;4.刪除一個(gè)選項(xiàng)optionfunctionremoveone()varobj=document.getelementbyid(&39;myselect&39;);/index,要?jiǎng)h除選項(xiàng)的序號(hào)，這里取當(dāng)前選中選項(xiàng)的序號(hào)varindex=obj.selectedindex;obj.options.remove(index);5.獲得選項(xiàng)option的值varobj=document.getelementbyid(&39;myselect&39;);varindex=obj.selectedindex;/序號(hào)，取當(dāng)前選中選項(xiàng)

5、的序號(hào)varval=obj.optionsindex.value;6.獲得選項(xiàng)option的文本varobj=document.getelementbyid(&39;myselect&39;);varindex=obj.selectedindex;/序號(hào)，取當(dāng)前選中選項(xiàng)的序號(hào)varval=obj.optionsindex.text;7.修改選項(xiàng)optionvarobj=document.getelementbyid(&39;myselect&39;);varindex=obj.selectedindex;/序號(hào)，取當(dāng)前選中選項(xiàng)的序號(hào)varval=obj.opti

6、onsindex=newoption(&quot;新文本&quot;,&quot;新值&quot;);8.刪除selectfunctionremoveselect()varmyselect=document.getelementbyid(&quot;myselect&quot;);myselect.parentnode.removechild(myselect);9.設(shè)置selectoptin被中functionremoveselect()/向辦件人員下拉列表動(dòng)態(tài)添加員工for(vari=0;i<json.length;i+)varnewoption=newoption(jsoni.empname,jsoni.empid,i);/向辦件人員下拉列表添加員工信息objdeal.options.add(newoption);/客戶業(yè)務(wù)員的id不為空if(empbydealempid!=&quot;&quot;|empbydealempid!=0)/員工id等于下拉列表中的值,則下拉列表被選