// funcion para abrir ventana con la funcion imprimir
function MM_openBrWindow(theURL,winName,features, myWidth, myHeight, isCenter) { //v2.0
  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);
}

// funcion para abrir popup
function pop(url, name, scroll, width, height){
	var w = width;
	var h = height;
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2 - 30;
	window.open(url,name,"scrollbars="+scroll+",width="+w+",height="+h+",top="+wint+",left="+winl+",resizable=no,status=no,location=no,toolbar=no,menubar=no");
}