f5刷新ie背景图片出现丢失的问题？

引用:

.title{ color:#7ab136; padding: 8px 0 8px 19px; }
.about h3,.contact h3,.topnew h3,.newimg h3,.directory,.menu_left h3,.contact ul,.list_t,.list_t h3,.imgbox1 h3{ background: url(../images/img.png) no-repeat; }
.about h3,.menu_left h3,.contact h3,.imgbox1 h3,.search_left h3{ background-position: left -74px; }
.about p {text-indent: 2em; line-height:24px; padding:8px;}
.about img{padding-left:12px}