function Ajax() {
	var xmlhttp=false;
	try {
		xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
	} catch (e) {
		try {
		   xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		} catch (E) {
			xmlhttp = false;
  		}
	}
	if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
		xmlhttp = new XMLHttpRequest();
	}
	return xmlhttp;
}


/***********************************************/
/* Funcion de ajax general
/***********************************************/

function objajax(campo,consulta,donde,loader){
	if(!loader){ loader = "loader"; }
var ajax = new Array();
var campoloader = campo+"loader";
ajax[0] = Ajax();
	ajax[0].open("GET", consulta);
	donde.getElementById(campo).innerHTML = '';
	
	ajax[0].onreadystatechange=function() {
		if (ajax[0].readyState == 1) {
			if(donde.getElementById(campoloader) == null){
				donde.getElementById(campo).innerHTML = '<div style="position:absolute; top:150px; left:50%; margin-left:-16px; width:32px; height:32px"><img src="imagenes/ajax-'+ loader +'.gif" width="32" height="32" border="0" alt="Loading" /></div>';
			}else{
				donde.getElementById(campoloader).innerHTML = '<div style="position:absolute; top:150px; left:50%; margin-left:-16px; width:32px; height:32px"><img src="imagenes/ajax-'+ loader +'.gif" width="32" height="32" border="0" alt="Loading" /></div>';
			}
		}
		if (ajax[0].readyState == 4) {
			if(donde.getElementById(campoloader) == null){
				donde.getElementById(campo).innerHTML = ajax[0].responseText;
			}else{
				donde.getElementById(campo).innerHTML = ajax[0].responseText;
				donde.getElementById(campoloader).innerHTML = '';
			}
		}
	}
	ajax[0].send(null)
		
}

function objajaxpost(campo,consulta,variables,donde,loader){
	if(!loader){ loader = "loader"; }
var ajax = new Array();
var campoloader = campo+"loader";
var query = variables +"&nocache=" + Math.random();
ajax[0] = Ajax();
	ajax[0].open("POST", consulta);
	ajax[0].onreadystatechange=function() {
		if (ajax[0].readyState==1 || ajax[0].readyState==2 || ajax[0].readyState==3) {
			if(donde.getElementById(campoloader) == null){
				donde.getElementById(campo).innerHTML = '<div style="position:absolute; width:100%; height:37px; margin:4px 10px 0 auto"><img src="imagenes/ajax-'+ loader +'.gif" border="0" alt="" /></div>';
			}else{
				donde.getElementById(campoloader).innerHTML = '<div style="position:absolute; width:100%; height:37px; margin:4px 10px 0 auto"><img src="imagenes/ajax-'+ loader +'.gif" border="0" alt="" /></div>';
			}
		}
		if (ajax[0].readyState==4) {
		donde.getElementById(campo).innerHTML = ajax[0].responseText;
		}
	}

	ajax[0].setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    ajax[0].send(query);
}