OK here are some snippets of the code ... Kmotion function update_view_select(active_view) { for (i=1; i<5; i++) { i2=i*i if (i2 == active_view) { document.getElementById("view"+i2+"_png").src="view"+i2+"_red_url"; } else { document.getElementById("view"+i2+"_png").src="view"+i2+"_blue_url"; } } } at bottom of page ... the line document.getElementById("view"+i2+"_png").src="view"+i2+"_red_url";