php导出下载Excel文件被IE阻止，怎么解决？用流输出也不行！

$file_name="test.xls";$file_path="../data/down/2011/03/21/";$file_name = urldecode($file_name);// ../ is not allowed in the file nameif (!ereg("(\.\.\/)", $file_name)){// Does the file exist?	if (file_exists($file_path . $file_name))	{		$fp = @fopen( $file_path . $file_name, "r" );		//Prompt the user to download the new torrent file.		header("Expires: 0" );		header("Pragma:public" );		header("Cache-Control:must-revalidate,post-check=0,pre-check=0" );		header("Cache-Control:public");		header("Content-Type:application/octet-stream" );				if (strstr($_SERVER["HTTP_USER_AGENT"],"MSIE"))	{			header("Content-Disposition:attachment;filename=".urlencode($file_name) );		}else{			header("Content-Disposition:attachment;filename=".$file_name );		}		header("Content-transfer-encoding: binary");		header("Content-length:".@filesize( $file_path . $file_name ));				@fpassthru( $fp );		@fclose( $fp ); 	}	exit();} 

 $.ajax({			type: "post", 			dataType: "html", 			url: "query.php",			//data:url,			cache:false,			beforeSend:function(){$('#load').css("top",$(document).scrollTop());$('#load').show('100');},			complete :function(){$('#load').hide('100');},			success: function(html){ 								$("#tests").html(html); 				//window.location = "test.php";//这句话放在此处会出现阻止的提示				},error:function(XMLHttpRequest,textStatus ){				alert("页面请求错误，请联系系统管理员！\n"+textStatus);			}			});window.location = "test.php";//放在这个位置就正常了！