Although there’s a typo in the jQuery code, it lacks a colon (:) after “width”. Here’s the corrected code:

jQuery.fn.activeXOverlap = function() {

$(this).each(function(i){
var h = $(this).outerHeight();
var w = $(this).outerWidth();
var iframe = '' +
'' +
'' +
''
$(this).prepend(iframe);
});
}