var http_request = false;
var http_capa="";
var http_funcio="";

function envia_formulari_ajax(formulari,direccio,capa,carregant,funcio){
	var str = '';
	var elem = formulari.elements;
	var d = new Date() 
	
	if(funcio) http_funcio=funcio;
	else http_funcio="";
	
	http_capa=capa;
	for(var i = 0; i < elem.length; i++)
	{
		if(elem[i].type=="checkbox" || elem[i].type=="radio"){
			if(elem[i].checked)
				str += elem[i].name + "=" + encodeURI(elem[i].value) + "&";;
		}else{
		
			valor = elem[i].value;
			valor = valor.replace(/&/,"%26");
		
		
			str += elem[i].name + "=" + encodeURI(valor) + "&";
			if(elem[i].type=="text" || elem[i].type=="textarea") elem[i].value="";
		}
		//str += elem[i].name + "=" + elem[i].type +"&";
	}
	str += 'time=' +d.getTime();




	if(carregant=="1"){
		var codi =  '<div id="carregant"><img src="/img/carregant.gif"></div>';

		document.getElementById(capa).innerHTML = codi;
	}

	//document.getElementById(capa).innerHTML = str;
	makePOSTRequest(direccio,str);
}


function makePOSTRequest(url, parameters) {
	http_request = false;
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			// set type accordingly to anticipated content type
			//http_request.overrideMimeType('text/xml');
			http_request.overrideMimeType('text/html');
		}
	} else if (window.ActiveXObject) { // IE
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	
	if (!http_request) {
		alert('Cannot create XMLHTTP instance');
		return false;
	}

	http_request.onreadystatechange = alertContents;
	http_request.open('POST', url, true);
	http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	http_request.setRequestHeader("Content-length", parameters.length);
	http_request.setRequestHeader("Connection", "close");
	http_request.send(parameters);
}

function alertContents(capa) {
	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			//alert(http_request.responseText);
			result = http_request.responseText;
			           
			document.getElementById(http_capa).innerHTML = result; 
			if(http_funcio) setTimeout(http_funcio,1);
		}	
	}
}


function borrar_amic(usuari){
	if(confirm("Segur que vols borrar a "+usuari+" de la teva llista d'amics?")){
		f=document.formborrar;
		f.usuari.value=usuari;
		envia_formulari_ajax(f,"/repopblica.php","llista_amics",1);
	}
	
}