$(document).ready(function() {

	//grab all the anchor tag with rel set to shareit
	$('a[rel=shareit], #shareit-box').mouseenter(function() {		
		
		//get the height, top and calculate the left value for the sharebox
		var height = $(this).height();
		var top = $(this).offset().top;
		
		//get the left and find the center value
		var left = $(this).offset().left + ($(this).width() /2) - ($('#shareit-box').width() / 2);		
		
		//grab the href value and explode the bar symbol to grab the url and title
		//the content should be in this format url|title
		var value = $(this).attr('href').split('|');
		
		//assign the value to variables and encode it to url friendly
		var field = value[0];
		var url = encodeURIComponent(value[0]);
		var title = encodeURIComponent(value[1]);
		
		//assign the height for the header, so that the link is cover
		$('#shareit-header').height(height);
		
		//display the box
		$('#shareit-box').show();
		
		//set the position, the box should appear under the link and centered
		$('#shareit-box').css({'top':top, 'left':left});
		
		//assign the url to the textfield
		$('#shareit-field').val(field);
		
		//make the bookmark media open in new tab/window
		$('a.shareit-sm').attr('target','_blank');
		
		//Setup the bookmark media url and title
		$('a[rel=shareit-mail]').attr('href', 'mailto:?subject=' + title);
		$('a[rel=shareit-delicious]').attr('href', 'http://del.icio.us/post?v=4&noui&jump=close&url=' + url + '&title=' + title);
		$('a[rel=shareit-facebook]').attr('href', 'http://www.facebook.com/sharer.php?u='  + url + '&t=' + title);
		$('a[rel=shareit-digg]').attr('href', 'http://digg.com/submit?phase=2&url=' + url + '&title=' + title);
		$('a[rel=shareit-linkuj]').attr('href', 'http://linkuj.cz/?id=linkuj&ampurl=' + url + '&title=' + title);
		$('a[rel=shareit-twitter]').attr('href', 'http://twitter.com/home?status=' + title + '%20-%20' + title);
	});
	
	//onmouse out hide the shareit box
	$('#shareit-box').mouseleave(function () {
		$('#shareit-field').val('');
		$(this).hide();
	});
	
	//hightlight the textfield on click event
	$('#shareit-field').click(function () {
		$(this).select();
	});
});

function validate(form_id,email) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   var address = document.forms[form_id].elements[email].value;
   if(reg.test(address) == false) {
      alert('Neplatná emailová adresa. Prosím zadejte platnou adresu!');
      return false;
   }
}


function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}