var stopscroll=false;
 var preTop=0; 
 var currentTop=0; 
 var stoptime=0;
 var iInterval ;
 var ftag=1;
 var img_interval;
 var set_tag;
 var stop_tag = false;
var per_left=0;
var init_interval;
var left_intrerval;
document.getElementById("scroll_id").onmouseover=function (){
	stop_tag = true;
}
document.getElementById("scroll_id").onmouseout=function (){
	stop_tag = false;
}
document.getElementById("img_id2").onmouseover=function (){
	stop_tag = true;
	this.src ="../images/b_right2.jpg";
}
document.getElementById("img_id1").onmouseover=function (){
	stop_tag = true;
	this.src ="../images/b_left2.jpg";
}
document.getElementById("img_id1").onmouseout=function (){
	stop_tag = false;
	this.src ="../images/b_left.jpg";
}
document.getElementById("img_id2").onmouseout=function (){
	stop_tag = false;
	this.src ="../images/b_right.jpg";
}
//自动触发的函数
function inti_scroll(){
	img_interval = setInterval(scroll_left,1);
	if (stop_tag) return;
}
function set_stop(){
	setTimeout(inti_scroll,3000);
	if (stop_tag) return;
}
function sef_init(){
	init_interval = setInterval(scroll_first,1);
	if (stop_tag) return;
}
function scroll_left(){
	if (stop_tag) return;
	document.getElementById("scroll_id").scrollLeft=document.getElementById("scroll_id").scrollLeft+22;
	per_left+=22;
	if (document.getElementById("scroll_id").scrollLeft%660 ==0){
		clearInterval(img_interval);
		set_stop();
	}
	if (document.getElementById("scroll_id").scrollLeft<per_left) {
		clearInterval(img_interval);
		sef_init();
		per_left =0;
	}
}
function scroll_first(){
	if (stop_tag) return;
	document.getElementById("scroll_id").scrollLeft=document.getElementById("scroll_id").scrollLeft-22;
	if (document.getElementById("scroll_id").scrollLeft ==0) {
		clearInterval(init_interval);
		//set_stop();
	}
}

//点击触发的函数
function scroll_left_click(){
	clearInterval(left_intrerval);
	left_intrerval = setInterval(scroll_left_func,1);
}
function scroll_right_click(){
	clearInterval(left_intrerval);
	left_intrerval = setInterval(scroll_right_func,1);
}
function scroll_left_func(){
	document.getElementById("scroll_id").scrollLeft=document.getElementById("scroll_id").scrollLeft+22;
	per_left+=22;
	if (document.getElementById("scroll_id").scrollLeft%660 ==0){
		clearInterval(left_intrerval);
	}
	if (document.getElementById("scroll_id").scrollLeft<per_left) {
		clearInterval(left_intrerval);
		left_intrerval = setInterval(set_first_click,1);
		per_left =0;
	}
}
function scroll_right_func(){
	document.getElementById("scroll_id").scrollLeft=document.getElementById("scroll_id").scrollLeft-22;
	per_left-=22;
	if (document.getElementById("scroll_id").scrollLeft%660 ==0){
		clearInterval(left_intrerval);
	}
	if (document.getElementById("scroll_id").scrollLeft > per_left) {
		clearInterval(left_intrerval);
		left_intrerval = setInterval(scroll_end_func,1);
		per_left =1320;
	}
}
function scroll_end_func(){
	document.getElementById("scroll_id").scrollLeft=document.getElementById("scroll_id").scrollLeft+22;
	if (document.getElementById("scroll_id").scrollLeft ==1320) {
		clearInterval(left_intrerval);
	}
}
function set_first_click(){
	document.getElementById("scroll_id").scrollLeft=document.getElementById("scroll_id").scrollLeft-22;
	if (document.getElementById("scroll_id").scrollLeft ==0) {
		clearInterval(left_intrerval);
	}
}
set_stop();//初始化