replace - Set a variable as the ID of a clicked div, then modify that variable to select a different div -

i have multiple images , when click on 1 want code set specific images id ("image_select_1") variable. want modify variable removing text "select" (with underscores on either side of it) middle of variable becomes "image1". use variable target different div , fade in. here code have it's of course, not working.

        var foo;         $('.game_selection_image').click(function() {             foo = $(this).attr("id");             foo = foo.replace("_select_","");             $("#" + foo).fadein(500);         }); 

any appreciated, thank :)

watch variables

$("div.game_selection_image").click(function(e) {     var foo = $(this).attr("id");     foo = foo.replace("_select_","");     $('#' + foo).fadein(500); });