/*
 *  FileName    : couplet.js
 *  Author      : glodox
 *  Date        : 2005-07-08 18:15:06
 *  Copyright   : fangfa.net
 */

//--  function define begin --//
//when page change do this function 

function pageScroll()
{
    if(IE)
        ad_couplet_diffY = document.body.scrollTop;
    if(NS)
        ad_couplet_diffY = self.pageYOffset;

    if(ad_couplet_diffY != ad_couplet_lastScrollY)
    {
        percent = .1 * (ad_couplet_diffY - ad_couplet_lastScrollY);
        if(percent > 0) percent = Math.ceil(percent);
        else percent = Math.floor(percent);
        if(IE)
        {
            document.all.couplet_left.style.pixelTop += percent;
            document.all.couplet_right.style.pixelTop += percent;
        }
        if(NS)
        {
            document.couplet_left.top += percent; 
            document.couplet_right.top += percent; 
        }
        ad_couplet_lastScrollY = ad_couplet_lastScrollY + percent;
    }
}

// init page
function couplet_load()
{
    if(IE)
    {
        document.all.couplet_left.style.top     = ad_couplet_LeftDiv_Top;
        document.all.couplet_left.style.left    = ad_couplet_LeftDiv_Left;
        document.all.couplet_right.style.top    = ad_couplet_RightDiv_Top;
        document.all.couplet_right.style.right  = ad_couplet_RightDiv_Left;
    }
    if(NS)
    {
        document.couplet_left.top               = ad_couplet_LeftDiv_Top;
        document.couplet_left.left              = ad_couplet_LeftDiv_Left; 
        document.couplet_right.top              = ad_couplet_RightDiv_Top; 
        document.couplet_right.right            = ad_couplet_RightDiv_Left;
    }
}
//--  function define end --//
function hiden()
{
	window.couplet_left.style.display = 'none';	
	window.couplet_right.style.display = 'none';
}

//--  script run from this --//
ad_couplet_diffY            = 0;
ad_couplet_lastScrollY      = 0;

ad_couplet_LeftDiv_Top      = 100;
ad_couplet_LeftDiv_Left     = 20;
ad_couplet_RightDiv_Top     = 100;
ad_couplet_RightDiv_Left    = 20;

NS = (document.layers) ? 1 : 0;
IE = (document.all) ? 1: 0;


if(document.body.offsetWidth>800)
{
    //width lower 800 not display
    document.write(
        "<div id=couplet_left style='position: absolute;visibility:visible;z-index:100'><a href='#'><img src='../images/leftad5.jpg' width='90' height='286' border='0'></a><br><a href='#' onclick='hiden();'>¹Ø±Õ</a></div>" +
        "<div id=couplet_right style='position: absolute;visibility:visible;z-index:100'><a href='#'><img src='../images/leftad6.jpg' width='90' height='286' border='0'></a><br><a href='#' onclick='hiden();'>¹Ø±Õ</a></div>");
    couplet_load();
    if(NS || IE) action = window.setInterval("pageScroll()",1);
}
//--  script run end --//