function ajax_get( url , local_conteudo ) {
	function createXMLHttpRequest()
	{
		try{ return new ActiveXObject("Msxml2.XMLHTTP"); }catch(e){}
		try{ return new ActiveXObject("Microsoft.XMLHTTP"); }catch(e){}
		try{ return new XMLHttpRequest(); }catch(e){}
		alert("XMLHttpRequest not supported");
		return null;
	}
	var xhReq = createXMLHttpRequest();
	xhReq.open("get",url,true);
	xhReq.onreadystatechange = function do_readyStateChange(to) {
		if(xhReq.readyState == 1)
		{
		    document.getElementById(local_conteudo).innerHTML = '<img src="images/misc/13x13progress.gif" width="13" height="13" />&nbsp;';	
		}
		else if (xhReq.readyState == 4)
		{
			document.getElementById(local_conteudo).innerHTML = '&raquo;&nbsp;';
		}
		else
		{
			document.getElementById(local_conteudo).innerHTML = 'Link sin necesidad de registro';
			return false;
		}
	}
	xhReq.send(null);
}