// JavaScript Document
function findPos(obj) {
	var curleft = curtop = 0;
	if (obj.offsetParent) {
		do {
			curleft += obj.offsetLeft;
			curtop += obj.offsetTop;
		} while (obj = obj.offsetParent);
	}
	return [curleft,curtop];
}

function mostrarCategoria(id, obj)
{
	var opcMenu;
	var menuScroll;
	var otherOpc;
	var re;
	var positions = new Array();
	var posY;
	menuScroll = document.getElementById('menu').scrollTop;
	if(obj)
	{
		obj.className='menu_nohover';	
	}
	opcMenu = document.getElementById('opcMenu');
	otherOpc = document.getElementsByTagName('div');
	re = new RegExp('^o[0-9]+$'); 
	for (cont = 0; cont < otherOpc.length; cont++)
	{
		if(otherOpc[cont].id.match(re) && otherOpc[cont].id.substring(1) != id.substring(1))
			otherOpc[cont].className='menu_hover';
	}
	if(opcMenu)
	{
		if(document.getElementById(id))
		{
			positions =  findPos(obj);
			opcMenu.className = 'absoluto';
			opcMenu.innerHTML = document.getElementById(id).innerHTML;
			opcMenu.style.left = positions[0] + 250 + 'px';
			opcMenu.style.top = positions[1] - menuScroll + 'px';
		}
		else
		{
			opcMenu.className = 'hide';
			opcMenu.innerHTML = '';
		}
	}
}
function ocultarCategoria()
{

	var opcMenu;
	if(document.getElementById('opcMenu'))
	{
		opcMenu = document.getElementById('opcMenu');
		opcMenu.className = 'hide';
		opcMenu.innerHTML = '';
	}
}

function checkForm()
{
	var cname, cemail, csubject, cmessage;
	cname = document.getElementById('sname');
	cemail = document.getElementById('email');
	csubject = document.getElementById('subject');
	cmessage = document.getElementById('message');
	
	if(trim(cname.value) == '')
	{
		alert('Por favor introduce tu nombre.');
		cname.focus();
		return false;
	}
	else if(trim(cemail.value) == '')
	{
		alert('Por favor introduce tu e-mail.');
		cemail.focus();
		return false;
	}
	else if(!isEmail(trim(cemail.value)))
	{
		alert('La direccion e-mail que escribiste no es valida!');
		cemail.focus();
		return false;
	}
	else if(trim(csubject.value) == '')
	{
		alert('Por favor introduce el titulo.');
		csubject.focus();
		return false;
	}
	else if(trim(cmessage.value) == '')
	{
		alert('Por favor introduce tu mensaje.');
		cmessage.focus();
		return false;
	}
	else
	{
		cname.value    = trim(cname.value);
		cemail.value   = trim(cemail.value);
		csubject.value = trim(csubject.value);
		cmessage.value = trim(cmessage.value);
		return true;
	}
}

/*
Strip whitespace from the beginning and end of a string
Input : a string
*/
function trim(str)
{
	return str.replace(/^\s+|\s+$/g,'');
}

/*
Check if a string is in valid email format. 
Returns true if valid, false otherwise.
*/
function isEmail(str)
{
	var regex = /^[-_.a-z0-9]+@(([-_a-z0-9]+\.)+(ad|ae|aero|af|ag|ai|al|am|an|ao|aq|ar|arpa|as|at|au|aw|az|ba|bb|bd|be|bf|bg|bh|bi|biz|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|com|coop|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|edu|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gh|gi|gl|gm|gn|gov|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|in|info|int|io|iq|ir|is|it|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mil|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|museum|mv|mw|mx|my|mz|na|name|nc|ne|net|nf|ng|ni|nl|no|np|nr|nt|nu|nz|om|org|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|pro|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)|(([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5]))$/i;
	return regex.test(str);
}
function popup(url, titulo, ancho, alto){
	window.open(url , titulo, 'width='+ancho+',height='+alto+',scrollbars=NO'); 
	return false;
}
function js_void()
{
}