function downloadPeriodical(mgznid,mgzname,periodicalid,periodiacalname,downloadURL)
{
    if("downloadURL" == "")
    {
    	alert("对不起,该期刊目前还不能下载！")
    	return false;
    }
    window.open(downloadURL); 
    var url = "/personal/downmag.do?"
    url += "mgznid=" + mgznid;
    url += "&mgznname=" + mgzname;
    url += "&periodicalid=" + periodicalid;
    url += "&periodiacalname=" + periodiacalname;
    var http_request = newXMLHttpRequest();
    http_request.open("GET",url,true);	
	http_request.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");	
	http_request.send(null); 	  
}