如何改变type属性

[lljllj2000]

如何用button改变一个 type="hidden"的input为 type="button"?

<INPUT name="cancle" type="hidden" value="111">
<INPUT name="ok" onclick="ok_action()" type="button" value="確定">

[孟子E章]

不可以修改：
可以这样
<form>
<INPUT name="cancle" type="button" value="111" style="display:none">
<INPUT name="ok" onclick="cancle.style.display='block'" type="button" value="確定">
</form>

[BrentIvan]

<script language="JavaScript">
function changeType() {
document.all.oDiv.innerHTML = "<input type=\"button\" name=\"oInput\" id=\"oInput\">";
}
</script>
<div name="oDiv" id="oDiv"><input type="hidden" name="oInput" id="oInput" value="1"></div>
<input type="button" value="click me" onclick="changeType()">

[weidegong]

Perhaps,you can use it in this way:

<form name=mxh1>
<input id=mxh style="visibility:hidden">
<input name=aa type=radio onclick="document.all.mxh.style.visibility='visible'">显示
<input name=aa type=radio onclick="document.all.mxh.style.visibility='hidden'">隐藏
</form>

<script>
for(var i=0;i<document.mxh1.elements.length;i++)
{
if(document.mxh1.elements[i].type=="radio")
document.mxh1.elements[i].checked=""
}
</script>

[karma]

According to MSDN documentation:

As of Microsoft® Internet Explorer 5, the type property is read/write-once, but only when an input element is created with the createElement method and before it is added to the document.

[Reve]

cancle.outerHTML='<INPUT name="cancle" type="button" value="111">';