jQuery.fn.scrollTN = function(options){
	
	var defaults = { cur: 0, duration: 1000, auto_interval: 2500};

	var settings = jQuery.extend( {}, defaults, options);
	
	return this.each(function(obj,i){
		
		//alert(this.className);
		var cn = jQuery(this);
		var cur = settings.cur;
		var duration = settings.duration;
		var auto_interval = settings.auto_interval;
		var next;
		
		var btn		= jQuery('div.projectCntrlCnt2 > a');
		var btn_ind	= jQuery('a.index_a');		
		var Max		= cn.find('ul.slider > li').length;
		var size	= cn.find('ul.slider > li').eq(0).width();
		var sign	= '-';
		
		cn.find('ul.slider > li').eq(cur).css('display','block');
		
		jQuery('a.index_a').eq(cur).addClass('bltSlct');
		
		//on click action
		jQuery(btn).click(function(){ sign = (jQuery(this).hasClass('btnPre_project'))? '+' : '-';  call_animate(); });
		
		//on index click action
		jQuery(btn_ind).click(function(){ next = jQuery(btn_ind).index(this); if(next !=cur){sign = '-'; esa_animate(cur, next, sign); cur=next; } });
		
		function call_animate(){
			next = (sign=='+')? ( (cur == 0)? (Max-1) : cur-1 ) : ( (cur == (Max-1))? 0 : cur+1 );
			esa_animate(cur, next, sign);
			cur=next;
		}
		
		function esa_animate(cur, nxt, sign)	{
			cn.find('ul.slider > li').eq(cur).fadeOut('slow');
			cn.find('ul.slider > li').eq(nxt).fadeIn('slow');
			jQuery('a.index_a').removeClass('bltSlct').eq(next).addClass('bltSlct');
		}
	});
}

jQuery(document).ready(function(){
	
	var items = jQuery('div.scroller').scrollTN( {cur: 0, duration: 1500, auto_interval: 3000} );

});