var mainview_grey      = "./buttons/mainview_off.gif";
var mainview           = "./buttons/mainview_on.gif";
var drill_grey         = "./buttons/drilldown_off.gif";
var drill              = "./buttons/drilldown_on.gif";
var prev_drill_grey    = "./buttons/small_prev_off.gif";
var prev_drill         = "./buttons/small_prev_on.gif";
var next_drill_grey    = "./buttons/small_next_off.gif";
var next_drill         = "./buttons/small_next_on.gif";
var new_query          = "./buttons/newquery_on.gif";   
var help               = "./buttons/new-help-on.gif";
var folder             = "./buttons/myfolders_on.gif";
var search             = "search_on.gif";
var rewind             = "./buttons/rewind_on.gif";
var rewind_off         = "./buttons/rewind_off.gif";
var shortlist		= "./buttons/shortlist_on.gif";
var shortlist_off	= "./buttons/shortlist_off.gif";