function adj_func(ad_id,rel_id,fix){
	var ad = document.getElementById(ad_id);
	//广告的高度-想要调整内容以外的高度
	var hei = ad.offsetHeight-fix;
	//alert(hei);
	if(hei<13){
		$("#" + ad_id).parents(".div_body").hide();
		return ;
		//alert('cc');
	}

	var rel_obj = document.getElementById(rel_id);
	var rel_hei = rel_obj.offsetHeight;
	//alert('广告' + hei + 'rel' + rel_hei);
	//alert(rel_hei);
	//如果调整内容的高度大于广告的高度,remove the last child from node
	var t_str;
	while (rel_hei > hei)
	{
		var my_object = rel_obj.lastChild;
		rel_obj.removeChild(my_object);
		rel_hei = rel_obj.offsetHeight;
	}

	//alert(rel_obj.lineHeight);

	var space = hei-rel_hei;
	var top = Math.floor(space/2);

	var rel_par = rel_obj.parentNode;
	rel_par.style.paddingTop = top+"px";
	rel_par.style.paddingBottom = (space - top) + "px";
}