function CrearXHRb(){
 var ref=false;
 
  try{
	  ref=new ActiveXObject('Msxml2.XMLHTTP');
  }catch(e1){
	  try{
	  ref=new ActiveXObject('Microsoft.XMLHTTP');
	  }catch(e2){
		  ref=false;
	  }
  }
  if(!ref && (typeof XMLHttpRequest!='undefined' || window.XMLHttpRequest)){ 
	ref=new XMLHttpRequest();
  }
  return ref;
}

function inicializa(){
	var objXML= CrearXHRb();
	
	
	 var URL='texto_comercio.html';
	 objXML.open('GET',URL,false);
	 objXML.send(null);
	  if(objXML.readyState==4){
		 strTemas=objXML.responseText;
		 var el=document.getElementById('contenido');
		 el.innerHTML=strTemas;
		 
	  }    
	

}

function envioUbicacion(provi,canto){
	
	var idpro;
	var idcan;
	var strContenido="";
	var strSeparador="";
	
	
	var elemento=document.getElementById('contenido');
	
	var objXML=CrearXHRb();
	if(objXML){
		
		objXML.open('GET','show_comercio.php?idpro='+provi+'&idcan='+canto+'',false);
		objXML.send(null);
		elemento.innerHTML=objXML.responseText;
	}
	return false;
}