var winly='left='+(screen.width-510)/2+',top='+(screen.height-420)/2+',width=510,height=425';
var winxz='left='+(screen.width-482)/2+',top='+(screen.height-394)/2+',width=482,height=394';
var wincx='left='+(screen.width-482)/2+',top='+(screen.height-296)/2+',width=482,height=296';
function openwindow(opt){
   if (opt=='ly'){
      window.open('leaveword.jsp','lvwd',winly)
   } else if (opt=='xz'){
      window.open('gzlyxz.htm','lvwb',winxz)
   } else if (opt=='cx'){
      window.open('gzlyclcx.htm','lvwc',wincx)
   }
}