preload_img1=new Image();preload_img1.src='top_imgs/con_goods02.gif';
preload_img2=new Image();preload_img2.src='top_imgs/con_shopping02.gif';
preload_img3=new Image();preload_img3.src='top_imgs/con_process02.gif';
preload_img4=new Image();preload_img4.src='top_imgs/con_event02.gif';
preload_img5=new Image();preload_img5.src='top_imgs/con_farming02.gif';
preload_img6=new Image();preload_img6.src='top_imgs/con_bbs02.gif';
preload_img7=new Image();preload_img7.src='top_imgs/con_link02.gif';
preload_img8=new Image();preload_img8.src='top_imgs/con_diary02.gif';