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;
}

function gup( name ){
	var regexS = "[\\?&]"+name+"=([^&#]*)";
	var regex = new RegExp ( regexS );
	var tmpURL = window.location.href;
	var results = regex.exec( tmpURL );
	if( results == null )
		return"";
	else
	{
		alert(results[1]);
		return results[1];
	}
}

function actualizar(frm)
{
	var cad="actualizarPedido.php?";
	for(n=0; n<frm.length;n++)
	{
		cad+=frm.elements[n].name + "=" + frm.elements[n].value + "&";
	}
	//alert(cad);
	var aj=ajax();
	aj.open('GET', cad, true);
	aj.onreadystatechange=function() {
		if (aj.readyState==1) {
			/*document.getElementById('fped').innerHTML = "Cargando...";*/
		}
		if (aj.readyState==4) {
			document.getElementById('fped').innerHTML = aj.responseText
		}
	}
	 aj.send(null)
}

function preuQuant(input,form)
{
	form.importe.value = input.value*form.precio.value;
}

function IsNumber(e)
{
	tecla = (document.all) ? e.keyCode : e.which;

	if (tecla==8) return true;

	patron = /\d/; // Solo acepta números
	
	te = String.fromCharCode(tecla);

	return patron.test(te);
} 

/**
 * Custom button state handler for enabling/disabling button state. 
 * Called when the carousel has determined that the previous button
 * state should be changed.
 * Specified to the carousel as the configuration
 * parameter: prevButtonStateHandler
 **/
var handlePrevButtonState = function(type, args) {

	var enabling = args[0];
	var leftImage = args[1];
	if(enabling) {
		leftImage.src = "images/left-enabled.gif";	
	} else {
		leftImage.src = "images/left-disabled.gif";	
	}
	
};

/**
 * Custom button state handler for enabling/disabling button state. 
 * Called when the carousel has determined that the next button
 * state should be changed.
 * Specified to the carousel as the configuration
 * parameter: nextButtonStateHandler
 **/
var handleNextButtonState = function(type, args) {

	var enabling = args[0];
	var rightImage = args[1];
	
	if(enabling) {
		rightImage.src = "images/right-enabled.gif";
	} else {
		rightImage.src = "images/right-disabled.gif";
	}
	
};


/**
 * You must create the carousel after the page is loaded since it is
 * dependent on an HTML element (in this case 'mycarousel'.) See the
 * HTML code below.
 **/
var carousel; // for ease of debugging; globals generally not a good idea
var pageLoad = function() 
{
	carousel = new YAHOO.extension.Carousel("mycarousel", 
		{
			numVisible:        4,
			animationSpeed:    0.15,
			scrollInc:         4,
			navMargin:         40,
			prevElement:     "prev-arrow",
			nextElement:     "next-arrow",
			size:              17,
			prevButtonStateHandler:   handlePrevButtonState,
			nextButtonStateHandler:   handleNextButtonState
		}
	);

};

YAHOO.util.Event.addListener(window, 'load', pageLoad);