看不懂这段代码阿

window.showModalDialog("addHospReportMain.jsp?parentCode="+parentCode,"","dialogHeight:375px;dialogWidth:465px;center:yes;help:0;scroll:0;resizable:no;status:0");
   parent.mainMainFrame.openDialog();
  
    
   parent.mainMainFrame.location.href=parent.mainMainFrame.location.href;
  
   }