if ((screen.width == 640) && (screen.height == 480)) 
alert ("ATENCIÓN!!\r\rLa resolución de pantalla que Ud. utiliza actualmente no le permitirá ver bien este sitio.\r\rPor favor, cambie la resolución a 800x600 o más.\r\r\rGracias.")


function popUp(theURL,winName,features, myWidth, myHeight, isCenter) { //v3.0
if(myWidth=="" || myHeight==""){
		myWidth=680;
		myHeight=509;
	}
  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;
  }
  window.open(theURL,winName,features+((features!='')?',':'')+'width='+myWidth+',height='+myHeight);
}

function popupWindow(url) {
  window.open(url,'popupWindow','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,copyhistory=no,width=100,height=100,screenX=150,screenY=150,top=150,left=150')
}