var Ajax = new Object();
var Page = new Object();

Ajax.Request = function(url,id, callbackMethod)
{
	if ( id == 0 )
	{
		return;
	}
	Ajax.request = Ajax.createRequestObject();
	Ajax.request.onreadystatechange = callbackMethod;
	Ajax.request.open("POST", url+id, true);
	Ajax.request.send(url);
}

Ajax.BackA = function ()
{
	if(Ajax.CheckReadyState(Ajax.request))
	{		
		arr_reset(desc_coll); /*ritorna al valore iniziale*/
		arr_reset(desc_tipo);
		var	response = Ajax.request.responseXML.documentElement;
		var _colle = response.getElementsByTagName('coll');
		var _tipo = response.getElementsByTagName('tipo');
		//alert(_tipo);
		var i= 0;
		if(_colle.length != 0) {
		document.getElementById('c_colle').length = 0;
		document.getElementById('c_colle').options[0] = new Option(Lmsg[0],"0");
		for ( i =0; i < _colle.length ; i ++ )
		{
			var codin = response.getElementsByTagName('id')[i].firstChild.data;
			var labin = response.getElementsByTagName('fname')[i].firstChild.data;
			document.getElementById('c_colle').options[i+1] = new Option(labin,codin);	
			desc_coll[codin] = labin;
		}
		}
		var ii = i;
		if(_tipo.length != 0) {
		/*eval("document.getElementById('c_tipo').length = 0;");
		eval("document.getElementById('c_tipo').options[0] = new Option("+Lmsg[0]+",'0');");*/
		document.getElementById('c_tipo').length = 0;
		document.getElementById('c_tipo').options[0] = new Option(Lmsg[0],'0');
		for ( i = 0;  i < _tipo.length ; i ++ )
		{
			var codin = response.getElementsByTagName('id')[i+ii].firstChild.data;
			var labin = response.getElementsByTagName('fname')[i+ii].firstChild.data;
			eval('labin = Ltipolo_'+lang+'['+labin+']');
			document.getElementById('c_tipo').options[i+1] = new Option(labin,codin);	
			desc_coll[codin] = labin;
		}
		}
	}
}

Ajax.BackB = function ()
{
	if(Ajax.CheckReadyState(Ajax.request))
	{	
		codb_key.splice(0,codb_key.length);
		codb_dsc.splice(0,codb_dsc.length);
		document.getElementById('c_codB').length = 0;
		document.getElementById('c_codB').options[0] = new Option(Lmsg[2],"0");
		var	response = Ajax.request.responseXML.documentElement;
		var _data = response.getElementsByTagName('cli');
		if(_data.length == 0) {
			document.getElementById('c_codB').options[0] = new Option("-------",'0');	
		} else {
		var i = 0;
		for ( i = 0 ; i < _data.length ; i ++ )
			{
			var code_in = response.getElementsByTagName('fname')[i].firstChild.data;
			var ref_in = response.getElementsByTagName('id')[i].firstChild.data;
			document.getElementById('c_codB').options[i+1] = new Option(code_in,ref_in);
			codb_key[i] = ref_in;
			codb_dsc[i] = code_in;
			}
		}
	}
}


/* ------------ */

Ajax.createRequestObject = function()
{
	var obj;
	if(window.XMLHttpRequest)
	{
		obj = new XMLHttpRequest();
	}
	else if(window.ActiveXObject)
	{
		obj = new ActiveXObject("MSXML2.XMLHTTP");
	}
	return obj;
}

Ajax.CheckReadyState = function(obj)
{
	if(obj.readyState < 4) {		
	document.getElementById('loading').innerHTML = "<table border='0' cellpadding='0' cellspacing='0'><tr><td class='loading'><img src='grafi/wait.gif' border='0' /></td></tr></table>";  
	}
	if(obj.readyState == 4)
	{
		if(obj.status == 200)
		{
			document.getElementById('loading').innerHTML = "<table border=0 cellpadding=0 cellspacing=0 ><tr><td class='loaded'><img src='grafi/wait.gif' border='0' /></td></tr></table>";
			setTimeout('Page.loadOut()',400);
			return true;
		}
		else
		{
			document.getElementById('loading').innerHTML = "HTTP " + obj.status;
		}
	}
}

Page.loadOut = function ()
{
	document.getElementById('loading').innerHTML ='';	
}