function pop_locations(loc){
   locURL = '/locations.php' + ((loc)?'?loc='+loc:'');
   OpenCenteredWindow(locURL,'locations','menu=0,location=0,status=0,scrollbar=0', '725', '375', 'true')
}

function OpenCenteredWindow(theURL,winName,features, myWidth, myHeight, isCenter) {
  if(window.screen)if(isCenter)if(isCenter=="true"){
    var myLeft = (screen.width-myWidth)/2;
    var myTop = (screen.height-myHeight)/2;
    features+=(features!='')?',':'';
    features+=',left='+myLeft+',top='+myTop;
  } 
  nw = window.open(theURL,winName,features+((features!='')?',':'')+'width='+myWidth+',height='+myHeight);
  nw.focus();
}