function __windowOnLoad()
{
	h1 = document.getElementById('left_height').offsetHeight;
	h2 = document.getElementById('right_height').offsetHeight;
	
	if (h2 < h1)
		document.getElementById('right_height').style.height = (h1 + 50) + 'px';
	else
		document.getElementById('left_height').style.height = (h2 - 52) + 'px';
}

if (window.addEventListener) //DOM method for binding an event
	window.addEventListener("load", __windowOnLoad, false)
else if (window.attachEvent) //IE exclusive method for binding an event
	window.attachEvent("onload", __windowOnLoad)
else if (document.getElementById) //support older modern browsers
	window.onload=__windowOnLoad;// JavaScript Document