var ar_background = new Array();

ar_background[ar_background.length] = "int_mast_background1.jpg";
ar_background[ar_background.length] = "int_mast_background2.jpg";
ar_background[ar_background.length] = "int_mast_background3.jpg";
ar_background[ar_background.length] = "int_mast_background4.jpg";
ar_background[ar_background.length] = "int_mast_background5.jpg";