function switchImages(iid,iimg)
{
   idom = document.getElementById(iid);
   idom.src=iimg; 
}

function setColumns()
{
	leftShadow = document.getElementById("left-shadow");
        mainContent = document.getElementById("main-code");
	rightShadow = document.getElementById("right-shadow");
	
	if (leftShadow.offsetHeight)
	{
	     leftShadow.style.height = mainContent.offsetHeight + "px";
	     rightShadow.style.height = mainContent.offsetHeight + "px";	
	}
	else if (leftShadow.style.pixelHeight)
	{
	     leftShadow.style.height = mainContent.style.pixelHeight + "px";
             rightShadow.style.height = mainContent.style.pixelHeight + "px";
	}
}

window.onload = function() 
{
	 setColumns();
}