function getAvailSize() {
  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;
  }
  return [myWidth,myHeight];
}

function checkPosition()
{
	if(getAvailSize()[0] < 1350)
	{
		document.getElementById("left_girl").style.display = 'none';
		
	}
	else
	{
		document.getElementById("left_girl").style.display = 'block';
		
	}
}

function firstCheckPosition() {
    checkPosition();
    if (window.addEventListener)
        window.addEventListener("resize", function(){checkPosition();}, false);
    else {
        window.attachEvent("onresize", function(){checkPosition();});
    }
}

if (window.addEventListener)
    window.addEventListener("load", function(){firstCheckPosition();}, false);
else {
    window.attachEvent("onload", function(){firstCheckPosition();});
}