hi! From yesterday i made some progress. My slider bar is now completely functional... as long as there is only one instance of it. If i make another instance the first one stop responding and so on... so here is a completely functional html page... in body part there is script with three instances of slider class slider1,slider2 and slider3... slider3 is working correctly and if you comment it then slider2 is working and slider1 is not. Please help why does all sliders except the last one lose event listeners? again sorry for the bed English .