// JavaScript Document
  	function ConstructorXMLHttpRequest() 
{
	if(window.XMLHttpRequest) 
	{
		return new XMLHttpRequest(); 
	}
	else if(window.ActiveXObject)  
	{
		var versionesObj = new Array(
								'Msxml2.XMLHTTP.5.0',
								'Msxml2.XMLHTTP.4.0',
								'Msxml2.XMLHTTP.3.0',
								'Msxml2.XMLHTTP',
								'Microsoft.XMLHTTP');
		for (var i = 0; i < versionesObj.length; i++)
		{
			try 
			{
				return new ActiveXObject(versionesObj[i]);
			} 
			catch (errorControlado) 
			{
			}
		}
	}
throw new Error("No se pudo crear el objeto XMLHttpRequest");
}


//*****************************************************************************************************************************
	var peticion01 = null; 
	peticion01 = new ConstructorXMLHttpRequest();
	function estadoPeticion() 
	{
		switch(peticion01.readyState) 
		{
		case 0:document.getElementById('carga_form').innerHTML = '<img src="../images2/cargando.gif">';break;
		case 1:document.getElementById('carga_form').innerHTML ='<img src="../images2/cargando.gif">';break;
		case 2:document.getElementById('carga_form').innerHTML = '<img src="../images2/cargando.gif">';break;
		case 3:document.getElementById('carga_form').innerHTML = '<img src="../images2/cargando.gif">';break;
		case 4:document.getElementById('carga_form').innerHTML = 'Cargado';
		document.getElementById('carga_form').innerHTML = peticion01.responseText;break;
		}
	}
/****************************************************************************************************************************************************/
	
/**********************************************************************************************************************************************/
function Coger(url) 
	{
			if(peticion01) 
			{
			peticion01.open('GET', url, true); 
			peticion01.onreadystatechange = estadoPeticion; 
			peticion01.send(null); 
			}
	}
	

function carga_form(id){
	var form=document.getElementById(id).value;
	var url="";
	if(form=='pn')
		{
			url="Factura.php";
		}
	else if(form == 'em')
		{
			url="Boleta.php";
		}
	Coger(url);
}