小方框中浏览大图

来源：互联网发布：华为网络高级工程师编辑：程序博客网时间：2024/04/29 08:36

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style type="text/css">

</style>
<script type="text/javascript">
<!--
var p = new Array();
var speed = 0.05; //速度
var picWidth = 1280; // 大图的宽高
var picHeight = 971;
var x,y // 鼠标点下去时背景的坐标
var x_new,y_new //位移
var haveclick = false;

function movestart(event)
{
if(haveclick)
{
if(document.getElementById('pic').style.backgroundPosition.length==0)
{document.getElementById('pic').style.backgroundPosition="0px 0px";}
p = document.getElementById('pic').style.backgroundPosition.split(" ")

if(document.all)
{
  x_new = document.body.scrollLeft+event.clientX;
  y_new = document.body.scrollTop+event.clientY;
}else
{
  x_new = event.layerX;
  y_new = event.layerY;
}

x2 = (speed*(x_new-x)+parseInt(p[0])).toString(10);    // 计算位移量
y2 = (speed*(y_new-y)+parseInt(p[1])).toString(10);

if (x2<-picWidth+420) x2=-picWidth+420;
if (y2>0) y2=0;
if (x2>0) x2=0;
if (y2<-picHeight+300) y2=-picHeight+300;

document.getElementById('pic').style.backgroundPosition=x2+"px "+y2+"px";
}
}
-->
</script>
</head>