select的option属性value以及text值的获取操作

来源：互联网发布：sap软件费用编辑：程序博客网时间：2024/06/06 23:17
<!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)，没有就得到选项值(what is this ...)var obj=document.getElementById('testDiv');obj.innerText=option;}/* 通过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值为："+options[i].value+"。text值为："+options[i].text;//options[i].innerText也可以}}}/* 通过索引值selectedIndex来取得值*/function getSelectedThree(){var select=document.getElementById('publish');var selectedIndex=select.selectedIndex;//alert(selectedIndex);//索引为0123var obj=document.getElementById('testDiv');obj.innerText="value值为："+select.options[selectedIndex].value+"。text值为："+select.options[selectedIndex].text;}/* jQuery用法，为什么用的是val()跟text()，因为jQuery是js库，所以这里的val()跟text()是调用的方法，上面的原生的js的value跟text是原生js的属性。*/function getSelectedFour(){var selected=$("#publish option:selected");var value=selected.val();var text=selected.text();var obj=document.getElementById('testDiv');obj.innerText="value值为："+value+"。text值为："+text;}document.getElementById('publish').onclick=getSelectedFour;</script></body></html>
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