var imgPlus = "/images/site/plus.gif";
var imgMinus = "/images/site/minus.gif";

function ShowHideCollapsibleArea(strAreaId,strImg)
{
	var oCollAreaDiv = document.getElementById(strAreaId);
	var oCollAreaImg = document.getElementById(strImg); 
	if (oCollAreaDiv.style.display == 'none')
	{
		oCollAreaDiv.style.display = 'block';
		oCollAreaImg.src = imgMinus;
	}
	else
	{  
		oCollAreaDiv.style.display = 'none';
		oCollAreaImg.src = imgPlus; 
	}
}