SOURCE

var score;
score = document.window.getElementById('p01');

alert(score);

    <p id="p01">问题1</p>
    <form action="" method="get">
    <input name="qwe1" type="radio" value="" />daan1
    <input name="qwe1" type="radio" value="" />daan2
    <input name="qwe1" type="radio" value="" />daan3
    </form>
    
    <p id="p01">问题2</p>
    <form action="" method="get">
    <input name="qwe1" type="radio" value="" />daan1
    <input name="qwe1" type="radio" value="" />daan2
    <input name="qwe1" type="radio" value="" />daan3
    </form>
    
    <p id="p01">问题3</p>
    <form action="" method="get">
    <input name="qwe1" type="radio" value="" />daan1
    <input name="qwe1" type="radio" value="" />daan2
    <input name="qwe1" type="radio" value="" />daan3
    </form>