Selecting an html radio button dynamically through javascript does not work in IE
Question
I want to select a radio button from javascript. I am using this simple html file to test the issue. The code below works correctly on firefox and chrome, however it does not work in IE (no version works). I would like to know why the supplied code does not work on IE, and how to select a radio button in IE?
<html>
<head>
<script type="text/javascript">
function chooseOne()
{
var randomChoice = Math.round(Math.random() * 2);
if(randomChoice == 0)
{
document.getElementById("test0").checked = true;
}
else if (randomChoice == 1)
{
document.getElementById("test1").checked = true;
}
else
{
document.getElementById("test2").checked = true;
}
}
</script>
</head>
<body>
<input type="radio" id="test0" name="test" value="a" /> A<br />
<input type="radio" id="test1" name="test" value="b" /> B<br />
<input type="radio" id="test2" name="test" value="c" /> C<br />
<input type="button" name="click" value="CHOOSE" onclick="javascript:chooseOne()" />
</body>
Thanks in Advance, Spi
3 answers
solution1
2 ACCPTED 2010-10-06 23:07:47
First of all, you should give all your radio buttons the same name , otherwise they will act as if they are independent buttons:
<input type="radio" name="test" id="test0" value="a" /> A<br />
<input type="radio" name="test" id="test1" value="b" /> B<br />
<input type="radio" name="test" id="test2" value="c" /> C<br />
I'm guessing this is also the source of your problem. Further, once you do this, you only need to set one radio button's checked to true , that will automatically remove the selection from other buttons.
solution2
0 2010-10-06 23:07:02
我不确定，但是可能您必须告诉IE，您的onclick代码在javascript中是这样的：
<input type="button" name="click" value="CHOOSE" onclick="javascript:chooseOne()" />
solution3
0 2010-10-06 23:22:05
One problem: var randomChoice = Math.round(Math.random() * 2);
will always yield to 1
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