window.onload=frame_resize;
window.onresize=frame_resize;

function frame_resize()
{	
	var objFrameEl = document.getElementById("ifContent");
	//var frameHeight = document.body.offsetHeight 200;
	var frameHeight = document.body.clientHeight-220;

	if (frameHeight<0)
	{
		frameHeight=0;
	}	

	objFrameEl.style.height=frameHeight;
}