if ( document.images)
{
	prnOn = new Image;         
	prnOn.src = "images/prnOn.gif"; 
	prnOff = new Image;
	prnOff.src = "images/prnOff.gif";
}
else
{
	prnOn = "";
	prnOff = "";
}

function DisplayOn(imgField,imgName)
{
	if ( document.images)
	{
		document[imgField].src = eval(imgName + "On.src");
	}
}

function DisplayOff(imgField,imgName)
{
	if ( document.images)
	{
		document[imgField].src = eval(imgName + "Off.src");
	}
}

function DpOn(oInput,imgName)
{
	if ( document.images)
	{
		oInput.setAttribute("src", eval(imgName + "On.src"));
	}
}

function DpOff(oInput,imgName)
{
	if ( document.images)
	{
		oInput.setAttribute("src", eval(imgName + "Off.src"));
	}
}

function chgImg(imgField,imgName,state)
{
	if ( selectedF != imgField )
	{
		if ( state )
		{
			DisplayOn(imgField,imgName)
		}
		else
		{
			DisplayOff(imgField,imgName)
		}
	}
}

function Select(imgField,imgName)
{
	if ( selectedF != null )
	{
		DisplayOff(selectedF,selectedN);
	}
	
	selectedF = imgField;
	selectedN = imgName;
	DisplayOn(imgField,imgName);
}