document.write('	<style type="text/css">');
document.write('		#header{');
document.write('			margin:0px auto;');
document.write('			border:0px;');
document.write('			width: 760px;');
document.write('			height: 109px;');
document.write('			text-align: left;');
document.write('			background: url("/htm/images/sindex_top.jpg") no-repeat;');
document.write('		}');
document.write('	</style>');
document.write('	<div id="header">');
document.write('		<div title="北京大学首页" class="a1">');
document.write('			');
document.write('				北京大学');
document.write('			');
document.write('		</div>');
document.write('	</div>');