gistfile1.js

$(document).ready(function() {
	
	jQuery.fn.commentform =  function(){
		return this.each(function(){			
	    	$("#slider").slideToggle("slow").toggleClass('open');
	    	$(this).toggleClass("active");
			if($(this).attr('id')){
    			var replyData = /reply-([\d]{1,})-([\w]{1,})/.exec($(this).attr('id'));
		        var userSelection = getSelectedText();			       
		        if(userSelection){				        		        	       	
		        	$('textarea#comment').val("'"+userSelection+"'" + '\n\n' + '@'+replyData[2]+': ').focus();			        			        	
		        }else{
		        	$('textarea#comment').val('@'+replyData[2]+': ').focus();
		        }
    		}else{
    			$('textarea#comment').val('');
    		};
	    });
	};
	
	function getSelectedText(){
		if (window.getSelection){ return window.getSelection().toString(); }
		else if (document.getSelection){return document.getSelection(); }
		else if (document.selection){ return document.selection.createRange().text; } // this is specifically for IE 
    	return false;
	};
	 
	$('a.openform').click(function(){
		if(!$("#slider").hasClass('open')){
			$(this).commentform();
		}    		
		return false;
	})
	
});