window.onresize = show;

function show(){
	var h = getHeight();
	if (h < 700) {
	    document.getElementById("footer").style.top = "600px";
	} else {
	    var h1 = h - 129 + "px";
	    document.getElementById("footer").style.top = h1;
	}
}

function getHeight() {
  var myHeight = 0;
  if( typeof( window.innerHeight ) == 'number' ) {
    myHeight = window.innerHeight;
  } else if( document.documentElement && document.documentElement.clientHeight ) {
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && document.body.clientHeight ) {
    myHeight = document.body.clientHeight;
  }
  return myHeight;
}