Microsoft JScript runtime error: Out of stack space during Cascading DropdownList in asp.net

when you see this error then please check again your java script code because this is a JavaScript error, and it's usually happens when an recursive method called.

For Example :
This error also caused during cascading dropdown using asp.net Ajax.
The reason of error is that we used ParentControlID for first dropdownlist.

But there is only use of TargetControlID because first dropdownlist not have Parent Dropdownlist .

That caused JavaScript to perform the unwanted Recursion.