function setBgPos(){
	winHeight=window.getScrollHeight();
	newTop=winHeight-812;
		$E('body').setStyle('background-position','0px '+newTop+'px');
		
	// console.log(window.getHeight());

}



window.addEvent('load',function(){
	
		setBgPos.periodical(5000);

	
		// console.log('test');
		setBgPos();
		
		window.onresize=function(){
			setBgPos();
		}	
		
		
		
		function seesionkeeper(){
			
			myajax=new Ajax('ajax.keeper.php',{method:'get'}).request();
		}
		
		seesionkeeper.periodical(300000);
		
		
	
});