var timer;
var showed = null;	
	
function changePict(e, src){
	elem = document.getElementById(e);
	if( null != elem ){
		elem.src = src;
	}
}

function hide(){				
	if( null != showed ){
		elem = document.getElementById(showed);
		elem.style.display='none';
	}
}


function show(e){
	clearTimeout(timer)
	hide(showed);		
	showed = e;
	elem = document.getElementById(e);	
	elem.style.display='inline';	
}

function setShowed(e){
	showed = e;
}

function setHidden(e){
	timer = setTimeout("hide()", 1500);
}