function vEmail(mail)
{m=0;
var vl_correo = mail.split('@');
var vl_correo_2 = mail.indexOf('.');
if (vl_correo.length!=2 || vl_correo_2==-1)
	{
	m=1;
	}
	return m;
}

function vVacio(cad){
    var f=0;
	var i=0;
	var l=cad.length;
	while(i<l)
	{	if(cad.charAt(i)==" ")
		{
		 f++;
		}
		i++;
	}
	if(l<=0)
		{
		f=1;
		}
	return f;
}

function ponerCeros(tam,obj) {
	  while (trim(obj.value).length < tam)
		  obj.value = '0'+obj.value;
}