// JavaScript Document
var xmlHttp
	
function updatecalc(nro)
{
	xmlHttp = GetXmlHttpObject();
	if( xmlHttp == null)
	{
		alert ("Your browser does not support AJAX!");
		return;
	}
	var url = "calculadoras.php?calc=" + nro;
	xmlHttp.onreadystatechange = updatePanel;
	xmlHttp.open("GET",url,false);
	xmlHttp.send(null);
}

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

function GetXmlHttpObject()
{
	var xmlHttp=null;
	try
	{
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
	}
	catch(e)
	{
		// Internet Explorer
		try
		{
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch(e)
		{
			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	return xmlHttp;
}