var correctheight1=768;
var correctheight2=800;
var correctheight3=854;
var correctheight4=855;
var correctheight5=1000;
var correctheight6=1001;
var correctheight7=1100;
var correctheight8=1101;
var correctheight9=1280;
var correctheight10=1281;

if ((screen.height<=correctheight1)){
document.write("");}
else if ((correctheight2<=screen.height) && (screen.height<=correctheight3)){
document.write("<br/><br/>");}
else if ((correctheight4<=screen.height) && (screen.height<=correctheight5)){
document.write("<br/><br/><br/>");}
else if ((correctheight6<=screen.height) && (screen.height<=correctheight7)){
document.write("<br/><br/><br/><br/>");}
else if ((correctheight8<=screen.height) && (screen.height<=correctheight9)){
document.write("<br/><br/><br/><br/><br/>");}
else if ((screen.height>=correctheight10)){
document.write("<br/><br/><br/><br/><br/><br/>");}