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<html>
  <head>
  <title>ÑØÖ¸¶¨Â·¾¶Ô˶¯µÄͼƬ</title>
  </head>
  <script language="JavaScript">
  var win_width,win_height,img_left,img_top;
  var x_flag=0,y_flag=0;
  var x_step=2,y_step=1;
  var scroll_x; //Ò³ÃæÔÚˮƽ·½ÏòÉÏÒѾ­¹ö¶¯µÄ¾àÀë
  var scroll_y; //Ò³ÃæÔÚÊúÖ±·½ÏòÉÏÒѾ­¹ö¶¯µÄ¾àÀë
   
  function do_move()
  {
  scroll_x=id_body.scrollLeft;
  scroll_y=id_body.scrollTop;
  win_width=window.innerWidth?window.innerWidth:id_body.clientWidth;
  win_height=window.innerHeight?window.innerHeight:id_body.clientHeight;
  var img=document.getElementById("div_img");
   
  img_left=parseInt(img.style.left);
  img_top=parseInt(img.style.top);
  //===Í¼Æ¬ÒÆ¶¯µÄ×ó±ß½çΪ2
  if(img_left<=scroll_x+2)
  x_flag=1;
  //===Í¼Æ¬ÒÆ¶¯µÄÓұ߽çΪwin_width-moving_pic.width-2
  if(img_left>=scroll_x+win_width-moving_pic.width-2);
 


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