function page_height_init(){
	var measure_id = 'content_body';
	var change_id = 'm_c_c';
	var pad = 270;
	var minheight = 390;
	var e_m = document.getElementById(measure_id);
	if(e_m!=null){
		var h = e_m.offsetHeight;
		
		if (h<minheight){
			h = minheight;
			e_m.style.height = minheight-60 + 'px';
		}

		var e_c = document.getElementById(change_id);
		if(e_c!=null){
			e_c.style.height = h+pad + 'px';
			
		}

		var e_sep = document.getElementById('content_sep');
		if(e_sep!=null){
			e_sep.style.height = h-30 + 'px';
		}
	}
}