How to open CSS box

                                  
    //When you click on a link with class of poplight and the href starts with a # 
    $('a.poplight[href^=#]').click(function() {

$(document).ready(function(){
                                      
        var popID = $('a.poplight').attr('rel'); //Get Popup Name
        var popURL = $('a.poplight').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 ) }).prepend('<a href="#" class="close"><img src="close_pop.png" class="btn_close" title="Close Window" alt="Close" /></a>');
        
        //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 
        
	//Close Popups and Fade Layer
	$('a.close, #fade').live('click', function() { //When clicking on the close or fade layer...
	  	$('#fade , .popup_block').fadeOut(function() {
			$('#fade, a.close').remove();  
	}); //fade them both out
		
		return false;
	});

});