function changePic(pic,newsrc){
	pic.src = newsrc;
}

function changePicById(id,newsrc){
	document.getElementById(id).src = newsrc;
}

function showHelp(id){
	if(document.getElementById(id).style.display=='none'){
		document.getElementById(id).style.display = '';
	}else{
		document.getElementById(id).style.display = 'none';
	}
}

function sleep(){
	//sleeping
}