var main_folder = "img/btn_mainnav/";

var main_buttons = new Array(
	// main
	"glasbau",
	"winter",
	"industrie",
	"wohnen",
	"kontakt",
	"nurglas",
	"glasdach"
);

//var sub_buttons 

for(var i = 0; i < main_buttons.length; i++ ) {

	var img_obj_norm = new Image;
	img_obj_norm.src = main_folder + "btn_" + main_buttons[i] + "_norm.jpg";
	
	var img_obj_over = new Image;
	img_obj_over.src = main_folder + "btn_" + main_buttons[i] + "_over.jpg";
	
	//var img_obj_active = new Image;
	//img_obj_active.src = src_folder + "btn_" + buttons[i] + "_active.jpg";
		
}