function myOpen(page) {
  myX = (screen.availWidth-740)/2;
  myY = (screen.availHeight-580)/2;
  myWin = window.open(page,'popUp','width=740,height=580,screenX='+myX+',left='+myX+',screenY='+myY+',top='+myY);
}
function stor(page) {
  myX = (screen.availWidth-740)/2;
  myY = (screen.availHeight-640)/2;
  myWin = window.open(page,'popUp','width=740,height=640,screenX='+myX+',left='+myX+',screenY='+myY+',top='+myY);
}