var div2 = layer('subcontent');
var div1 = layer('left');
var div3 = layer('right');
var div1_height = div1.getHeight();
var div2_height = div2.getHeight();
var div3_height = div3.getHeight();


	if (div1_height > div2_height)
	{
		div2.css.height = div1_height; 
	}
	else
	{	
		if (div3_height > div2_height)
		{
			div2.css.height = div3_height;
		}
	}