function ajax(){
	var args=ajax.arguments;
	var action=args[0],method=args[1],form=args[2],plus=args[3];

	if(window.ActiveXObject){
		var req = new ActiveXObject("Microsoft.XMLHTTP");
	}else if(window.XMLHttpRequest){
		var req = new XMLHttpRequest();
	}

	req.onreadystatechange = function (){
		if(req.readyState == 4){
			eval(req.responseText);
		}
	}

	var form_data='';
	for(i=0;i<form.length;i++){
		if(form[i].type=="checkbox"){
			if(form[i].checked==true) {
				form_data+=form[i].name+'='+form[i].value+'&';
			}
		} else if(form[i].type=="radio"){
			if(form[i].checked==true) {
				form_data+=form[i].name+'='+form[i].value+'&';
			}
		} else if( form[i].type=="file" ) {
			continue;
		} else {
			form_data+=form[i].name+'='+form[i].value+'&';
		}
	}
	form_data+='form_name='+form.name+plus;
	
	if(method=='POST'){
		req.open('POST', action, true);
		var content_type = 'application/x-www-form-urlencoded';
//		var content_type = 'multipart/form-data'; AJAX no banca este tipo de codificacion
		if(args[4])
			content_type = args[4];
		req.setRequestHeader('Content-Type', content_type);

		req.send(form_data);
	}else if(method=='GET'){
		if(action.indexOf('?')==-1){
			action+='?'+form_data;
		} else {
			action+='&'+form_data
		}

		req.open('GET', action, true);
		req.send(null);
	}
}

function simple_ajax(){
	var args=simple_ajax.arguments;
	var action=args[0],method=args[1],values=args[2];
	
	if(window.ActiveXObject){
		var req = new ActiveXObject("Microsoft.XMLHTTP");
	}else if(window.XMLHttpRequest){
		var req = new XMLHttpRequest();
	}

	req.onreadystatechange = function (){
		if(req.readyState == 4){
			eval(req.responseText);
		}
	}
	
	if( method=='POST' ){
		req.open('POST', action, true);
		req.send(values);
	}else{
		req.open('GET', action+'?'+values, true);
		req.send(null);
	}
}