function alertSize(pl) {
  var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }
  if(pl==1){return myWidth;}
  else {return myHeight;}
}

function kaire() {
	var divplotis = 960;
	var ekranoplotis = alertSize(1);
	var sk = Math.round((ekranoplotis-divplotis)/2);
	return sk;
}
function virsus() {
	var divaukstis = 560;
	var ekranoaukstis = alertSize(0);
	var sk = Math.round((ekranoaukstis-divaukstis)/2);
	return sk;
}
function lb_move() {
	var kair = kaire();
	var vir = virsus();
	var ob = document.getElementById('ca');
	ob.style.left=kair;
	ob.style.top=vir;
}