function Switch(obj){
	if(document.getElementById){
	var el = document.getElementById(obj);
		if(el.style.display != "block"){ //DynamicDrive.com change
			el.style.display = "block";
		}else{
			el.style.display = "none";
		}
	}
}

// document.onload = document.getElementById('js_hlaska').setAttribute('style', 'display: none');