function bg(obj, color) {
  obj.style.backgroundColor = color;
}

function ToggleDomElement(){

	for (var i=0; i<ToggleDomElement.arguments.length; ++i)
	{
	    id = ToggleDomElement.arguments[i];

	    if (document.getElementById(id).style.visibility=="hidden")
	    {
		document.getElementById(id).style.visibility="";
		document.getElementById(id).style.display="";
	    }else{
		document.getElementById(id).style.visibility="hidden";
		document.getElementById(id).style.display="none";
	    }

	}
} 

function HideDomElement(){

	for (var i=0; i<HideDomElement.arguments.length; ++i)
	{
	    id = HideDomElement.arguments[i];

	    document.getElementById(id).style.visibility="hidden";
	    document.getElementById(id).style.display="none";

	}
} 

function ShowDomElement(){

	for (var i=0; i<ShowDomElement.arguments.length; ++i)
	{
	    id = ShowDomElement.arguments[i];

	    document.getElementById(id).style.visibility="";
	    document.getElementById(id).style.display="";

	}
}