function GetElement(sName){
	var oElement;
	if(!sName){
		return false;
	}
	if(document.getElementById){
		oElement = document.getElementById( sName );
	}
	else if( document.all ){
		oElement = document.all( sName );
	}
	else if( document.layers ){
		oElement = document.layers[ sName ];
	}
	if(oElement)
			return oElement;
		else
			return false;	
}	
function ShowHide(sElement){
	var oElement = GetElement(sElement);			
	if(oElement){
		if(oElement.style.display == "")
		{
			HideElement(sElement);					
		}
		else
		{
			ShowElement(sElement);
		}
	}else{
		return false;
	}
}

function ShowElement(sElement){
	var oElement = GetElement(sElement);			
	if(oElement){
		oElement.style.display = "";
	}else
		return false;
}

function HideElement(sElement){
	var oElement = GetElement(sElement);

	if(oElement){
		oElement.style.display = "none";
	}else{
		return false;
	}
}
function FlipImg(id)
{
	plus = 'imgplus'+id;
	minus = 'imgminus'+id;
	oPlus = GetElement(plus);
	oMinus = GetElement(minus);

	if(oPlus.style.display == "")
	{
		oPlus.style.display = "none";
		oMinus.style.display = "";
	}
	else
	{
		oPlus.style.display = "";
		oMinus.style.display = "none";				
	}
}