function popUp(theURL, myWidth, myHeight, isCenter, isFull) { //v3.0
  if(window.screen)if(isCenter)if(isCenter=="true"){
    var myLeft = (screen.width-myWidth)/2;
    var myTop = (screen.height-myHeight)/2;
  }
  if(isFull=="true"){
   var myLeft = 0;
    var myTop = 0;
	  var myWidth = (screen.width)-10;
    var myHeight = (screen.height)-60;
  }
  if (screen.width==800) {
  var myLeft = 0;
    var myTop = 0;
  }
opciones="toolbar=no,location=no,directories=no,";
opciones+="status=no,menubar=no,scrollbars=yes,resizable=yes,";
opciones+="width="+myWidth+",height="+myHeight+",top="+myTop+",left="+myLeft+"";
direccion='web.html';
window.open(theURL,'', opciones);
}