Drop down box in header not working in a particular page?

[JM]

Drop Down box in header of my website which is common for all pages, But it is not working in a particular page. I have checked the console of firebug and it shows "\[code\]Resource interpreted as Script but transferred with MIME type text/plain\[/code\]" before clicking the drop down box and after clicking it shows "(program):48Uncaught RangeError: Maximum call stack size exceeded\[code\]s.toJSONStringObject.toJSONStringObject.toJSONStringObject.toJSONStringObject.toJSONStringObject.toJSONStringObject.toJSONString"\[/code\]Can anyone help me on this ?Thanks in advance.