function show_product_info()  { 
	if (xmlHttp.readyState==4) { 
		document.getElementById("product_information").innerHTML=xmlHttp.responseText;
	}
}

function p_info(product, tab) {
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null){
		alert ("Your browser does not support AJAX!");
		return;
	}
	
	var url="../data/p_info.php?i="+product+"&t="+tab;
	xmlHttp.onreadystatechange=show_product_info;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}