Javascript警报变量，[Object htmlDivElement]错误？

Question

我已经制作了一个简单的表单，其中有一个是和否的复选框，我想要它，这样当我按下它时会在一个警告框中显示5，当我按下它时它会显示0但是当前我点击提交它在警报框中显示[Object htmlDivElement]。

<script>

 function alertprice() {            // this will be called on submit of the form
 alert (runningtotal);           // alert the value in variable running total
 }


function totalprice () {                    // function totalprice will set runningtotal depending on boxes ticked
    if(document.getElementById('ramyes').checked) {
        var runningtotal = "5"
            return runningtotal;
}else if(document.getElementById('ramno').checked) {
        var runningtotal = "0"
            return runningtotal;
}
}
          </script>

和html

<form name="theForm" action="shop.html" method="post" onSubmit="checkWholeForm(theForm); return alertprice()">
                <h2>Upgrade RAM to "4GB-Kit GEIL Evo One PC3-12800 DDR3-1600 CL9"?</h2>

        <h3>
            <input type="radio" name="ram" value="yes" id="ramyes">yes<br>
            <input type="radio" name="ram" value="no" id="ramno">no     
        </h3>

Answer 1

你必须调用你的函数totalprice（）。例如：

function alertprice(){
    alert(totalprice());
}