For what you need (to open the same page where this button), no matter if it's an iframe or if in the home page.
The only difference is if you want that data to open in new window, are a reflection of the same page, such as data that can be an input.
If you care about who are the same data:
$("#mybuttonOpenWin").click(function(){
window.open(window.location.href);
});
If you are interested, you can try this code:
$("#mybuttonOpenWin").click(function(){
var mref = window.open(window.location.href);
(function = onReadyRef(xref){
if(xref.window.document.readyState=="complete"){
$(xref.window.document).find("body").html($("body").html());
}
else{
onReadyRef.call(this, xref);
}
})(mref);
});