Sharepoint choice field (radio button) is displaying vertically

Hi,

I have created a sharepoint choice field and added 5 values to that.I changed the column type to radio button instead of displaying as a dropdown.But it is displaying in vertical position instead of horizontal position.

I tried to apply spservices script after placing jquery files in my custon form but that is not working.

$().SPServices.SPArrangeChoices({
	columnName: "Lead Source",
	perRow: 2
});

the above code is changing anything.

Please provide any solution for this.

Poovi