I have this table with some styled tds (I put screenshot because the content of td is pretty big)

Now, I want to add some css to this table so I try to select its td by one if its classes and apply the style like:
jQuery(".graTabbedComponentDefaultTabs").parent('table').css('position','relative');
But nothing happens….Do you see the problem?
Thanks in advance.
You need to use parents(), not parent().
Parent() will look 1 level up in the DOM. Parents() will traverse up the DOM until it finds a matching element.