function preload(arrayOfImages) {
    $(arrayOfImages).each(function(){
        $('<img/>')[0].src = this;
        
    });
}

// Usage:

preload([
    './imgs/purchase_phys_active.png',
    './imgs/purchase_dig_active.png',
    './imgs/news_active.gif',
    './imgs/disco_active.gif',
    './imgs/shop_active.gif',
    './imgs/photo_active.gif',
    './imgs/live_active.gif',
    './imgs/video_active.gif',
    './imgs/etc_active.gif',
    './imgs/purchase_lp_active.png',
    './imgs/purchase_cd_active.png',
    './imgs/purchase_seven_active.png',
    './imgs/purchase_shirt_active.png',
    './imgs/purchase_tote_active.png',
    './imgs/back_disco_active.png',
    './imgs/back_news_active.png',
    './imgs/back_photo_active.png',
    './imgs/back_shop_active.png',
    './imgs/back_video_active.png',
    './imgs/purchase_12_active.png',
    './imgs/purchase_free_active.png'

]);


$(document).ready(function(){

	$('.contentbox, .contentbox_video, .contentbox_photo').css({"opacity":0})
	.animate({'opacity': 1}, 800); 
		
	$("img.phys_buttons,input.phys_buttons,img.dig_buttons,img.cd_buttons,input.cd_buttons,img.lp_buttons,input.lp_buttons,img.seven_buttons,input.seven_buttons,img.shirt_buttons,input.shirt_buttons,img.tote_buttons,input.tote_buttons,img.back_disco,img.back_video,img.back_photo,img.back_shop").hover(
	 function(){this.src = this.src.replace("_inactive","_active");},
	 function(){this.src = this.src.replace("_active","_inactive");}
	);

				  
});