var huandengsrc = new Array();
var huandengh = new Array();
var huandengw = new Array();
var huandenga = new Array();
var imgsizess = 0;
var dangqiansss = 0;


jQuery(function($) {
	imgsizess=$(".tupianqiehuan li").size();
	for (i=0;i<imgsizess;i++){
	var sbcb = i+1;
	t = $(".tupianqiehuan li:nth-child("+sbcb+") img");
	huandengsrc[i] = t.attr("src");
	huandengh[i] = t.attr("cheight");
	huandengw[i] = t.attr("cwidth");
	if ( huandengw[i]>680){
      		
	  huandengh[i]=680* huandengh[i]/huandengw[i];
	  huandengw[i]=680;
	 }
	huandenga[i] = t.attr("alt");
	}
	$(".tupianqiehuan").append("<img class=\"lookit\" /><div class=\"but\" ><img style=\"cursor: pointer;\" id=\"left_over\" src=\"/html/images/button_begin.gif\" alt=\"第一页\" /><img style=\"cursor: pointer;\" id=\"left_go\" src=\"/html/images/button_prv.gif\"  alt=\"上一页\" /><img style=\"cursor: pointer;\" id=\"rigth_go\" src=\"/html/images/button_next.gif\"  alt=\"下一页\" /><img style=\"cursor: pointer;\" id=\"rigth_over\" src=\"/html/images/button_end.gif\"  alt=\"末页\" /><img style=\"cursor: pointer;\" id=\"yuantu\" src=\"/html/images/button_yuantu.gif\"  alt=\"原图\" /></div><div class=\"tishi\"></div>");
	xc(0);
	$(".but img").click( function () {
		if ($(this).attr("id")=="left_over"){
			 xc(0);
			}else if ($(this).attr("id")=="rigth_over"){
			 xc(imgsizess-1);
			}else if ($(this).attr("id")=="left_go"){
				if (dangqiansss <= 0){
					dangqiansss = imgsizess;
					}
			 xc(dangqiansss-1);
			} else if ($(this).attr("id")=="rigth_go"){
				if (dangqiansss >= imgsizess){
					dangqiansss = -1;
					}
			 xc(dangqiansss+1);
			} else if ($(this).attr("id")=="yuantu"){
				window.open(huandengsrc[dangqiansss],'1','scrollbars=yes,resizable=yes,width='+$(".tupianqiehuan li:nth-child("+(dangqiansss+1)+") img").attr("cwidth")+',height='+$(".tupianqiehuan li:nth-child("+(dangqiansss+1)+") img").attr("cheight"))
			}
			
			
			
		});
})
function xc(ii){
	$(".lookit").fadeTo(100, 0.1,function(){
			dangqiansss = ii;
	$(".lookit").attr("src",huandengsrc[ii]);
	$(".lookit").height(huandengh[ii]);
	$(".lookit").width(huandengw[ii]);
	$(".lookit").attr("alt",huandenga[ii]);
	$(".tishi").html(huandenga[ii]);
		$(".lookit").fadeTo(300,1);
		} )


	}