var isIE = false;	

if (navigator.userAgent.indexOf('MSIE') > 0)
	isIE = true;
	
function resizeShadows()
{
	var MainContentContainer = document.getElementById("MainContent");
	var LeftShadow = document.getElementById("LeftShadow");
	var RightShadow = document.getElementById("RightShadow");
	
	if (isIE)
	{
		LeftShadow.style["height"] = MainContentContainer.offsetHeight;
		RightShadow.style["height"] = MainContentContainer.offsetHeight;
	}
	else
	{
		LeftShadow.style["height"] = MainContentContainer.offsetHeight;
		RightShadow.style["height"] = MainContentContainer.offsetHeight;
	}
}