window.onresize=page_resize;
document.onresize=page_resize;

function page_onload(){
	menu_onload();
	page_resize();
}

function page_resize(){
	if(getWindowWidth() > 1000){
		document.getElementById('wrapper').style.width='965px';
		//document.body.style.backgroundImage='url(\'http://www.jetdesign.co.uk/new/jetbg1024.png\')'
		//change bg
	}
	else{
		document.getElementById('wrapper').style.width='770px';
		//document.body.style.backgroundImage='url(\'http://www.jetdesign.co.uk/new/jetbg.png\')'
	}
}

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