JQuery :: Convert Button OnClick To Link HRef

I have a few input buttons per page:
<input type="button" value="MyButton" onclick="location='[URL]'">
I want to convert them to:
<a href="[URL]"><span>MyButton</span></a>

How can I convert that with jquery? I try to get the onlick val but jquery or javascript seems to convert onclick to a function. I have this, but it's not quite right, I'm trying to just move the onclick data to the link, but I'd rather do it with href.
$(":button").each(function(){
var ocval = $(this).attr("onclick").val();
$(this).replaceWith("<a class="button" href="javascript:void(0);"
onclick=""+ ocval +""><span>" + $(this).val() + "</span></a>");
});