js javascript 根據後臺的值預設選中單選按鈕,radio,單選預設值,單選扭預設
阿新 • • 發佈：2018-11-29
js javascript 根據後臺的值預設選中單選按鈕,radio,單選預設值,單選扭預設
<html> <head> <title>初始化單選</title> <script> function initradio(rName,rValue){ var rObj = document.getElementsByName(rName); for(var i = 0;i < rObj.length;i++){ if(rObj[i].value == rValue){ rObj[i].checked = 'checked'; } } } </script> </head> <body> <form action="#"> 黑<input type="radio" name="tRadio" value="1"> 色<input type="radio" name="tRadio" value="2"> 頭<input type="radio" name="tRadio" value="3"> 發<input type="radio" name="tRadio" value="4"> </form> <script> initradio('tRadio',3); </script> </body> </html>