I've a problem when I want to use a context menu with IE6

I’ve a problem when I
want to use a context menu with IE6. When I add this single line in my
code,  IE6 stops with the

 error. 

 w_menu=new
dhtmlXContextMenuObject(‘120’,0,“Menu”);The script works fine with Firefox

This
is native problem of IE. Please call initialization code in onload event, not
just from html.

Something
similar to the next:

 

                …