function showDiv(obj, a)
{
	if( document.getElementById(obj)){
		var div = document.getElementById(obj);
	}else{
		return false;
	}
	if(a==1){
		div.style.display = "block";
		div.parentNode.style.zIndex = 99;
	}else{
		div.style.display = "none";
		div.parentNode.style.zIndex = 0;
	}
	
}