
Admin
Well-Known Member
Staff member
Administrator
Tạo file lenxuong.js ngang hàng index dán code này vào
Sau đó upload 2 ảnh vào thư mục images
Xong
Dán vào header hoặc footervar nsc_dy=150;
var nsc_dtime=4;
function nsc_gettop()
{
try{
if(window.pageYOffset!=undefined)
return window.pageYOffset;
return window.document.body.scrollTop;
}catch(err)
{
try{
return window.document.body.scrollTop;
}catch(err2)
{
return 0;
}
}
}
function nsc_croll_top()
{
var nsc_body_obj=window.document.body;
var nsc_cur_stop=nsc_gettop();
window.scrollBy (0,-nsc_dy);
var nsc_new_stop=nsc_gettop();
if(nsc_cur_stop>nsc_new_stop)
setTimeout("nsc_croll_top()",nsc_dtime);
else
document.getElementById("nsc_scroll_down_img").style.display="block";
return false;
}
function nsc_croll_down()
{
var nsc_body_obj=window.document.body;
var nsc_cur_stop=nsc_gettop();
window.scrollBy (0,nsc_dy);
var nsc_new_stop=nsc_gettop();
if(nsc_cur_stop<nsc_new_stop)
setTimeout("nsc_croll_down()",nsc_dtime);
else
document.getElementById("nsc_scroll_down_img").style.display="none";
return false;
}
function nsc_display_scroll_btn()
{
var nsc_body=window.document.body;
var nsc_height=nsc_body.scrollHeight;
var nsc_top=nsc_gettop();
//document.getElementById("scroll").innerHTML=nsc_top+"/"+nsc_height;
if(nsc_top==0)
document.getElementById("nsc_scroll_up_img").style.display="none";
else
document.getElementById("nsc_scroll_up_img").style.display="block";
/*
if(nsc_top>=nsc_height-nsc_body.clientHeight)
document.getElementById("nsc_scroll_down_img").style.display="none";
else
document.getElementById("nsc_scroll_down_img").style.display="block";
*/
}
setInterval("nsc_display_scroll_btn()",100);
document.write('<div style="position: fixed; width: 40px; right: 8px; bottom: 25px;"> <a href="#" onclick="return nsc_croll_top()"><img border="0" id="nsc_scroll_up_img" src="images/goup.png"></a> <a href="#" onclick="return nsc_croll_down()"><img border="0" id="nsc_scroll_down_img" src="images/godown.png"></a></div></div>');
Code:
if (!$is_mobile){
echo '<script src="/lenxuong.js" type="text/javascript"></script>';
}


Xong