So... This script. Makes that, When you click on a link with class of poplight and the href starts with a #, the popup fades out. And i need, that popup fade out suddenly when script is loaded. I don't know js anything yet. So please, help me.
<script type="text/javascript">
$(document).ready(function(){

//When you click on a link with class of poplight and the href starts with a #
$('a.poplight[href^=#]').click(function() {
var popID = $(this).attr('rel'); //Get Popup Name
var popURL = $(this).attr('href'); //Get Popup href to define size

//Pull Query & Variables from href URL
var query= popURL.split('?');
var dim= query[1].split('&');
var popWidth = dim[0].split('=')[1]; //Gets the first query string value

//Fade in the Popup and add close button
$('#' + popID).fadeIn().css({ 'width': Number( popWidth ) });

//Define margin for center alignment (vertical + horizontal) - we add 80 to the height/width to accomodate for the padding + border width defined in the css
var popMargTop = ($('#' + popID).height() + 80) / 2;
var popMargLeft = ($('#' + popID).width() + 80) / 2;

//Apply Margin to Popup
$('#' + popID).css({
'margin-top' : -popMargTop,
'margin-left' : -popMargLeft
});

//Fade in Background
$('body').append('<div id="fade"></div>'); //Add the fade layer to bottom of the body tag.
$('#fade').css({'filter' : 'alpha(opacity=80)'}).fadeIn(); //Fade in the fade layer

return false;
});


//Close Popups and Fade Layer
$('a.close, #fade').live('click', function() { //When clicking on the close or fade layer...
$('#fade , .popup_block').fadeOut(); //fade them both out
$('#fade').remove();
return false;
});


});
</script>