var image_counter=1;
var total_buttons=8;
var game_buttons=[5];
var high_imag= new Image;
high_imag.src="images_global/nav/button_f2.gif"
var reg_imag= new Image;
reg_imag.src="images_global/nav/button.gif";
var blink_speed =200;
var game_imag = new Image; 
game_imag.src = "images_global/nav/button_game.gif";
var teach_img = new Image;
teach_img.src = "images_global/nav/teacherGuide_f2.gif";
var links_img = new Image;
links_img.src = "images_global/nav/links_f2.gif";
var gloss_img = new Image;
gloss_img.src = "images_global/nav/glossary_f2.gif";



t=0;
clearT();