$(document).ready(function(){     	 

	 var head_pos=0;
	 var head_total=2;	
	 var head_width=330;
	 $('.main_head_image').clone().appendTo('.main_head_slider_panel');

	 function main_head_moveSlider(index){
		
		 var targetLeft=-(index*head_width);
		 var temp=index;
		 if(index>(head_total-1)){						
						index=index-head_total;
			}	

		 $('.main_head_slider_panel').stop(true).animate({left:targetLeft},'slow','swing',function(){
				if(temp>(head_total-1)){
						$('.main_head_slider_panel').css('left',0);
						head_pos=temp-head_total;
					}			 
			 });		
	 }

	var head_auto_rolling=function(){		
		head_rolling=setInterval(function(){
			head_pos+=1;			
			main_head_moveSlider(head_pos);
		},2000);

	}

	var head_stop_rolling=function(){
		clearInterval(head_rolling);
	}
	main_head_moveSlider(head_pos);
	head_auto_rolling();

			   
});