if (top != self) top.location.href=self.location.href; 

function dummyHandler()
{
	return false;
}    

function prepareLinks()
{
	var allspans = document.getElementsByTagName("span");

	for (i = 0; i < allspans.length; i++)
	{
		if (allspans[i].className == "preview")
		{
			alllinks = allspans[i].getElementsByTagName("a");
			
			for (k = 0; k < alllinks.length; k++)
			{
				alllinks[k].onclick = dummyHandler;
			}
		}
	}
}

window.onload = prepareLinks;