function window_popper(theURL,winName,features) {
  return window.open(theURL,winName,features);
}

function window_popper_center(theURL,winName,features, myWidth, myHeight, isCenter) {

  if(window.screen)if(isCenter)if(isCenter=="true"){
  
    if (navigator.appName.indexOf("Microsoft")!=-1) {
      winW = parent.document.body.offsetWidth;
      winH = parent.document.body.offsetHeight;
      pixE = 10; // Estimate pixels of toolbar crap on top of window
    }
    else {
      winW = parent.window.innerWidth;
      winH = parent.window.innerHeight;
      pixE = 30; // Estimate pixels of toolbar crap on top of window
    }
    var myLeft = ( winW - myWidth )/2;
    var myTop =  ( winH - myHeight)/2 + pixE;
    
    features+=(features!='')?',':'';
    features+=',left='+myLeft+',top='+myTop;
    
  }
  
  return window.open(theURL,winName,features+((features!='')?',':'')+'width='+myWidth+',height='+myHeight);
  
}