function close_div(div_name){
	if(!div_name){div_name="div_show";}
document.getElementById(div_name).style.display="none";
//document.getElementById(div_name).style.visibility="hidden"; 
document.getElementById("div_bg").style.width='0px';
document.getElementById("div_bg").style.height='0px';
}

function show(div_bg,div_id){
document.getElementById(div_bg).style.width=document.documentElement.scrollWidth+'px';
document.getElementById(div_bg).style.height=document.documentElement.scrollHeight+'px';
var el=document.getElementById(div_id);

el.style.display="block";
//el.style.displayvisibility="visible";

var innerxy = getInnerXY();
var offxy = getScrollXY();
var llq=pd_llq();
	if (llq[0]) { // ie
	
	el.style.top= ((innerxy[1]-el.clientHeight)/2 + offxy[1])+"px";
	el.style.left=((innerxy[0]-el.clientWidth)/2 + offxy[0])+"px";
	} else {
	el.style.top = ((innerxy[1]-el.clientHeight)/2+ offxy[1])+"px";
	el.style.left = ((innerxy[0]-el.clientWidth)/2+ offxy[0])+"px";
	}

}


function getInnerXY() {
  var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }
  return [myWidth, myHeight];
}

function getScrollXY() {
  var scrOfX = 0, scrOfY = 0;
  if( typeof( window.pageYOffset ) == 'number' ) {
    //Netscape compliant
    scrOfY = window.pageYOffset;
    scrOfX = window.pageXOffset;
  } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
    //DOM compliant
    scrOfY = document.body.scrollTop;
    scrOfX = document.body.scrollLeft;
  } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
    //IE6 standards compliant mode
    scrOfY = document.documentElement.scrollTop;
    scrOfX = document.documentElement.scrollLeft;
  }
  return [ scrOfX, scrOfY ];
}


function pd_llq(){
        var Sys = {};
        var ua = navigator.userAgent.toLowerCase(); 
    var s;  
    (s = ua.match(/msie ([\d.]+)/)) ? Sys.ie = s[1] :  
    (s = ua.match(/firefox\/([\d.]+)/)) ? Sys.firefox = s[1] :  
    (s = ua.match(/chrome\/([\d.]+)/)) ? Sys.chrome = s[1] :  
    (s = ua.match(/opera.([\d.]+)/)) ? Sys.opera = s[1] :  
    (s = ua.match(/version\/([\d.]+).*safari/)) ? Sys.safari = s[1] : 0; 

return [Sys.ie,Sys.firefox,Sys.chrome,Sys.opera,Sys.safari];

}

function up_pic(qianzhui,num,pic){
	//图片命名 js_num.jpg
	//num 一组图片多少个
	var thispic=document.getElementById(pic);
	var picurl=thispic.src;
	


var file_name=picurl.substring(picurl.lastIndexOf('/')+1);  //正则表达式获取文件名，不带后缀
	arr=file_name.split('.');
	arr_1=arr[0];
	arr=arr_1.split('_');
	arr_2=arr[1];
	var temp=arr_2;
	if(arr_2>=num){temp=1;}else{temp++;}

	thispic.src='images/'+qianzhui+temp+'.jpg';


}

function next_pic(qianzhui,num,pic){
		//图片命名 js_num.jpg
	//num 一组图片多少个
	var thispic=document.getElementById(pic);
	var picurl=thispic.src;
	


var file_name=picurl.substring(picurl.lastIndexOf('/')+1);  //正则表达式获取文件名，不带后缀
	arr=file_name.split('.');
	arr_1=arr[0];
	arr=arr_1.split('_');
	arr_2=arr[1];
	var temp=arr_2;
	if(arr_2<=1){temp=num;}else{temp--;}
	//alert(temp);
	thispic.src='images/'+qianzhui+temp+'.jpg';

}

function new_up_pic(ary,pic,nums){
	var picary = ary.split(',');
	var num = picary.length;
	var now = 0;
	var now_num = document.getElementById(nums).value;
	now_num = now_num - 1;
	if(now_num < 0){
		now = parseInt(num) - 1;
	}else{
		now = now_num;
	}
	document.getElementById(pic).src = picary[now];
	document.getElementById(nums).value = now;
}

function new_next_pic(ary,pic,nums){
	var picary = ary.split(',');
	var num = picary.length;
	var now = 0;
	var now_num = document.getElementById(nums).value;
	now_num = parseInt(now_num) + 1;
	if(now_num >= num){
		now = 0;
	}else{
		now = now_num;
	}
	document.getElementById(pic).src = picary[now];
	document.getElementById(nums).value = now;
}