var timespan = navigator.useragent.indexof("firefox") > 0 ? 15 : 10;
var adconfig = false;
var hasbutton = false; //是否在右上角显示关闭按钮
function addevent(obj, eventtype, func)
{
if (obj.addeventlistener)
{
obj.addeventlistener(eventtype, func, false);
}
else if (obj.attachevent)
{
obj.attachevent("on" + eventtype, func);
}
}
function adconfiginit()
{
adconfig = new object();
adconfig.left = 0;
adconfig.top = 0;
adconfig.width = 0;
adconfig.height = 0;
adconfig.scroll = function()
{
if (document.documentelement && document.documentelement.scrollleft)
{
adconfig.left = document.documentelement.scrollleft;
}
else if (document.body)
{
adconfig.left = document.body.scrollleft;
}
if (document.documentelement && document.documentelement.scrolltop)
{
adconfig.top = document.documentelement.scrolltop;
}
else if (document.body)
{
adconfig.top = document.body.scrolltop;
}
}
adconfig.resize = function()
{
if (document.documentelement && document.documentelement.clientheight && document.body && document.body.clientheight)
{
adconfig.width = (document.documentelement.clientwidth > document.body.clientwidth) ? document.body.clientwidth : document.documentelement.clientwidth;
adconfig.height = (document.documentelement.clientheight > document.body.clientheight) ? document.body.clientheight : document.documentelement.clientheight;
}
else if (document.documentelement && document.documentelement.clientheight)
{
adconfig.width = document.documentelement.clientwidth;
adconfig.height = document.documentelement.clientheight;
}
else if (document.body)
{
adconfig.width = document.body.clientwidth;
adconfig.height = document.body.clientheight;
}
}
adconfig.scroll();
adconfig.resize();
addevent(window, "scroll", adconfig.scroll);
addevent(window, "resize", adconfig.resize);
}
function adpopup(id, title, content, width, height, top, side, autoclose)
{
var popup = window.open("", "win" + id, "width=" + width + ", height=" + height + ", top=" + top + ", left=" + side);
popup.document.write("");
popup.document.write(title);
popup.document.write("");
popup.document.write(content);
popup.document.write("");
}
function adfloat(obj, width, height, top, side, autoclose)
{
var directx = 1;
var directy = 1;
obj.move = function()
{
if (side + width >= adconfig.left + adconfig.width)
{
side = adconfig.left + adconfig.width - width;
directx = -1;
}
else if (side <= adconfig.left)
{
side = adconfig.left;
directx = 1;
}
if (top + height >= adconfig.top + adconfig.height)
{
top = adconfig.top + adconfig.height - height;
directy = -1;
}
else if (top <= adconfig.top)
{
top = adconfig.top;
directy = 1;
}
side += directx;
top += directy;
obj.style.left = side + "px";
obj.style.top = top + "px";
}
var interval = window.setinterval(obj.move, timespan);
obj.onmouseover = function()
{
window.clearinterval(interval);
}
obj.onmouseout = function()
{
interval = window.setinterval(obj.move, timespan);
}
if (autoclose)
{
obj.onclick = function()
{
window.clearinterval(interval);
obj.style.display = "none";
}
}
}
function adhangleft(obj, top, autoclose)
{
obj.move = function()
{
var t = parseint(obj.style.top, 10);
if (t + 5 < adconfig.top + top)
{
obj.style.top = (t + 5) + "px";
}
else if (t - 5 > adconfig.top + top)
{
obj.style.top = (t - 5) + "px";
}
}
var interval = window.setinterval(obj.move, timespan);
if (autoclose)
{
obj.onclick = function()
{
window.clearinterval(interval);
obj.style.display = "none";
}
}
}
function adhangright(obj, top, autoclose)
{
obj.move = function()
{
var t = parseint(obj.style.top, 10);
if (t + 5 < adconfig.top + top)
{
obj.style.top = (t + 5) + "px";
}
else if (t - 5 > adconfig.top + top)
{
obj.style.top = (t - 5) + "px";
}
}
var interval = window.setinterval(obj.move, timespan);
if (autoclose)
{
obj.onclick = function()
{
window.clearinterval(interval);
obj.style.display = "none";
}
}
}
function adprepare(id, title, url, mode, pic, width, height, top, side, autoclose)
{
if (!adconfig)
adconfiginit();
var content = adcontent(url, pic, width, height);
if (mode == "popup")
{
adpopup(id, title, content, width, height, top, side, autoclose);
return;
}
document.writeln("" + content + "");
var obj = document.getelementbyid("adver_" + id);
switch(mode)
{
case "float":
adfloat(obj, width, height, top, side, autoclose);
break;
case "hangl":
adhangleft(obj, top, autoclose);
break;
case "hangr":
adhangright(obj, top, autoclose);
break;
}
}
function adcontent(url, pic, width, height)
{
var pictype = pic.substr(pic.lastindexof(".") + 1).tolowercase();
var content;
if (pictype == "swf")
{
content = "";
if (url != "")
if (hasbutton)
content = "
" + content;
else
content = "" + content;
else
content = "" + content;
}
else
{
content = "![](" + pic + ")
";
if (url != "")
if (hasbutton)
content = "" + content + "";
else
content = "" + content + "";
}
return content;
}