<!DOCTYPE html><html><head><style type="text/CSS"></style></head><body><select id="publish"><option value="1">what is this</option><option value="2">this is select</option><option value="3">oh,thanks</option><option value="4">you are welcome</option></select><div id="testDiv"></div><script type="text/JavaScript" src="publicJQuery/jquery-2.1.4.js"></script><script type="text/JavaScript">function getSelected(){var option=document.getElementById('publish').value;//有value就得到value(1,2,3,4)，沒有就得到選項值(what is this ...)var obj=document.getElementById('testDiv');obj.innerText=option;}/* 通過option直接取得值*/function getSelectedTwo(){var options=document.getElementsByTagName('option');var obj=document.getElementById('testDiv');for(var i=0; i<options.length; i++){if(options[i].selected==true){obj.innerText="value值為："+options[i].value+"。text值為："+options[i].text;//options[i].innerText也可以}}}/* 通過索引值selectedIndex來取得值*/function getSelectedThree(){var select=document.getElementById('publish');var selectedIndex=select.selectedIndex;//alert(selectedIndex);//索引為0123var obj=document.getElementById('testDiv');obj.innerText="value值為："+select.options[selectedIndex].value+"。text值為："+select.options[selectedIndex].text;}/* jQuery用法，為什麼用的是val()跟text()，因為jQuery是js庫，所以這裡的val()跟text()是調用的方法，上面的原生的js的value跟text是原生js的屬性。*/function getSelectedFour(){var selected=$("#publish option:selected");var value=selected.val();var text=selected.text();var obj=document.getElementById('testDiv');obj.innerText="value值為："+value+"。text值為："+text;}document.getElementById('publish').onclick=getSelectedFour;</script></body></html>
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
