function addLoadEvent(func)
	{
		if(typeof window.addEventListener == 'function')
		{
		window.addEventListener('load', func, false);
		return true;
	 	}
	 	else if(typeof window.attachEvent == 'object')
	 	{
			window.attachEvent('onload', func);
			return true;
		}
	}

	function myGetHeight()
	{
		var leftbox  = $('SideMenu');
		var rightbox = $('Content');
		
		var ret_l = Element.getHeight(leftbox);
		var ret_r = Element.getHeight(rightbox);
		
		if( ret_l > ret_r )
		{
			document.getElementById("Content").style.height = ret_l+"px";
		}
	}
	
	addLoadEvent(myGetHeight);