// JavaScript Document
function getHeight(){ return document.all ? document.documentElement .clientHeight : window.innerHeight; }
function getWidth(){ return document.all ? document.documentElement.clientWidth : window.innerWidth; }	
function getVisible(){ window.document.getElementById("picture").style.visibility="visible";return false;}
function getInvisible(){ window.document.getElementById('picture').style.visibility='hidden';return false;}