function addLoadListener(fn)
{
	if (typeof window.addEventListener != 'undefined')
	{
	window.addEventListener('load', fn, false);
}
else if (typeof document.addEventListener != 'undefined')
{
	document.addEventListener('load', fn, false);
}
else if (typeof window.attachEvent != 'undefined')
{
	window.attachEvent('onload', fn);
}
else
{
	var oldfn = window.onload;
	if (typeof window.onload != 'function')
	{
	window.onload = fn;
	}
	else
	{
	window.onload = function()
	{
	oldfn();
	fn();
	};
	}
	}
}

addLoadListener(changeHeight)

function changeHeight() {

var myContentDiv = document.getElementById("product_content");
	if(myContentDiv)
	{
		var myOffsetPixels = myContentDiv.offsetHeight;
		var myOffsetPixelsFinal = myOffsetPixels + "px";

		var mySideDiv = document.getElementById("side_nav");
		var myOffsetPixels2 = mySideDiv.offsetHeight;
		var myOffsetPixelsFinal2 = myOffsetPixels2 + "px";

		//alert(myOffsetPixelsFinal);
		//alert(myOffsetPixelsFinal2);

		if (myOffsetPixels > myOffsetPixels2) {
			mySideDiv.style.height = myOffsetPixelsFinal;
		}
	}
}