addLoadListener(changeHeight)

function changeHeight(left_column, right_column) {

// insert the id for each of the two columns you want to equalize

left_column = "sidebar_inside";
right_column = "content_main_inside";

var myOffsetLeft = document.getElementById(left_column);
var myLeftDivPadding = Number(retrieveComputedStyle(myOffsetLeft, "paddingTop").replace("px", "")) + Number(retrieveComputedStyle(myOffsetLeft, "paddingBottom").replace("px", ""));
var myLeftDivBorders = Number(retrieveComputedStyle(myOffsetLeft, "borderTopWidth").replace("px", "")) + Number(retrieveComputedStyle(myOffsetLeft, "borderBottomWidth").replace("px", ""));
var myOffsetPixelsLeftAmount = myOffsetLeft.offsetHeight + myLeftDivPadding + myLeftDivBorders - 2;
var myOffsetPixelsLeft = myOffsetPixelsLeftAmount + "px";

//alert(myOffsetPixelsLeftAmount);

var myOffsetRight = document.getElementById(right_column);
var myRightDivPadding = Number(retrieveComputedStyle(myOffsetRight, "paddingTop").replace("px", "")) + Number(retrieveComputedStyle(myOffsetRight, "paddingBottom").replace("px", ""));
var myRightDivBorders = Number(retrieveComputedStyle(myOffsetRight, "borderTopWidth").replace("px", "")) + Number(retrieveComputedStyle(myOffsetRight, "borderBottomWidth").replace("px", ""));
var myOffsetPixelsRightAmount = myOffsetRight.offsetHeight + myRightDivPadding + myRightDivBorders - 2;
var myOffsetPixelsRight = myOffsetPixelsRightAmount + "px";

	if (myOffsetPixelsLeftAmount > myOffsetPixelsRightAmount) {
		myOffsetRight.style.height = (myOffsetPixelsLeftAmount - myLeftDivPadding - myRightDivPadding - myRightDivBorders - myLeftDivBorders) + "px";
	}
	/*else
	{
		myOffsetLeft.style.height = (myOffsetPixelsRightAmount - myLeftDivPadding - myRightDivPadding - myRightDivBorders - myLeftDivBorders) + "px";
	}*/
}

function retrieveComputedStyle(element, styleProperty)
{
		var computedStyle = null;
		
		if (typeof element.currentStyle != "undefined")
		{
			computedStyle = element.currentStyle;
		}
		else
		{
			computedStyle = document.defaultView.getComputedStyle(element, null);
		}
		return computedStyle[styleProperty];
}