var checkflag = "false";
function check(field) {
if (checkflag == "false") {
for (i = 0; i < field.length; i++) {
field[i].checked = true;}
checkflag = "true";
return "Deseleccionar todos"; }
else {
for (i = 0; i < field.length; i++) {
field[i].checked = false; }
checkflag = "false";
return "Seleccionar todos"; }
}

 b1=new Image(); b1.src="images/b_festiclown.gif"; b1o=new Image(); b1o.src="images/b_festiclown_o.gif"
 b2=new Image(); b2.src="images/b_galeuzca.gif"; b2o=new Image(); b2o.src="images/b_galeuzca_o.gif"
 b3=new Image(); b3.src="images/b_olladas.gif"; b3o=new Image(); b3o.src="images/b_olladas_o.gif"
 b4=new Image(); b4.src="images/b_terractiva.gif"; b4o=new Image(); b4o.src="images/b_terractiva_o.gif"
 b5=new Image(); b5.src="images/b_mundoclown.gif"; b5o=new Image(); b5o.src="images/b_mundoclown_o.gif"

function NavRollOver(oTd) {if (!oTd.contains(event.fromElement)) {oTd.bgColor="#93C52E";}}
function NavRollOut(oTd) {if (!oTd.contains(event.toElement)) {oTd.bgColor="#1CA4DD";}}

function ValidarFormulario(formulario)
{
	var reg_mail = /^[\.A-Za-z0-9_-]+\@[\.A-Za-z0-9_-]+\.[\.A-Za-z0-9_-]+$/;
	var flag=true;
	with(formulario)
	{
		for(i=0;i<elements.length;i++)
		{
			if (elements[i].name != "" && elements[i].name != "area")
			{
				if(elements[i].value == "" )
				{
					alert("Debe cubrir o campo "+elements[i].name);
					flag=false;
				}
				else
				{
					if (elements[i].name = "EMAIL")
					{
						if (!(reg_mail.test(EMAIL.value)))
						{
							alert("O formato do Email é incorrecto");
							flag=false;
						}
					}
				}
			}
		}
	}
	
	return flag;
}


function Seleccion(cultura)
{
	with(document.boletines)
	{
		for(i=0;i<elements.length;i++)
		{
			if (elements[i].checked == true )
			{
				cultura.checked=true;
				elements[i].checked=false;
			}
		}
	}
}


function changeIt(imageName,objName)
{
	var obj = document.getElementById(objName);
	var imgTag = "<img src='"+imageName+"' border='0' class='fportada' name='slide' style='filter:blendTrans(duration=5)' />";
	obj.innerHTML = imgTag;
	return;	
}