Javascript couplet advertisement, floating advertisement encapsulation class (ie, FF, opera, Safari, Chrome)

/*
Couplet advertisement call
The first parameter is ID, the second parameter is image, and the third parameter is the distance from the advertisement to the top,
The fourth parameter indicates left and right (true indicates left, false indicates right), and the fifth parameter indicates the width of the couplet advertisement.
*/
New float_ad ("ad_l", "New float_ad ("ad_r", "

/*
Floating ad call
The URL in the first parameter represents the URL of the floating ad image (required), link to the page url, ALT image prompt text, width image width (optional, default 120 ), heihgt Image Height (optional, 120 by default)
The second parameter represents the initial position of the floating AD, which is specified by the left and top parameters.
The third parameter indicates the floating speed. 0 indicates the static speed. The smaller the floating speed, the faster the floating speed.
*/
New move_ad ({URL: "/system/uploads/allimg/090504/2346400 .gif", link:" http://jzyouth.org.cn/html/zixun/zuixingonggao/2009327/zxgg47926848.html ", alt: "Notice on recruiting volunteers for" 2009 China Dalian International Cherry Festival ", width: 200, height: 200 },{ left: 40, top: 160}, 20 );

// Core Code
Function $ (element ){
If (arguments. length> 1 ){
For (VAR I = 0, elements = [], length = arguments. length; I <length; I ++)
Elements. Push ($ (arguments [I]);
Return elements;
}
If (typeof element = "string ")
Return document. getelementbyid (element );
Else
Return element;
}
Function. Prototype. Bind = function (object ){
VaR method = this;
Return function (){
Method. Apply (object, arguments );
}
}
VaR class = {
Create: function (){
Return function (){
This. Initialize. Apply (this, arguments );
}
}
}
Object. Extend = function (destination, resource ){
For (VAR property in resource ){
Destination [property] = Resource [property];
}
Return destination;
}
// Couplet advertising class http://www.knowsky.com/article.asp? Typeid = 36
VaR float_ad = Class. Create ();
Float_ad.prototype = {
Initialize: function (ID, content, top, left, width ){
Document. Write ('<Div id =' + ID + 'style = "position: absolute;">' + content + '</div> ');
This. ID = $ (ID );
This. Top = top;
If (!! Left ){
This. Id. style. Left = "8px ";
} Else {
This.id.style.left.pdf (document.doc umentelement. clientWidth-width-8) + "PX ";
Window. onresize = function (){
This.id.style.left.pdf (document.doc umentelement. clientWidth-width-8) + "PX ";
}. BIND (this );
}
This. Id. style. Top = Top + "PX ";

This. interid = setinterval (this. Scroll. BIND (this), 20 );
},
Scroll: function (){
This. stmnstartpoint = parseint (this. Id. style. Top, 10 );
This. stmnendpoint upload document.doc umentelement. scrolltop + this. Top;
If (navigator. useragent. indexof ("Chrome")> 0 ){
This. stmnendpoint = Document. Body. scrolltop + this. Top;
}
If (this. stmnstartpoint! = This. stmnendpoint ){
This. stmnscrollamount = math. Ceil (math. Abs (this. stmnendpoint-This. stmnstartpoint)/15 );
This. Id. style. Top = parseint (this. Id. style. Top, 10) + (this. stmnendpoint <this. stmnstartpoint )? -This. stmnscrollamount: This. stmnscrollamount) + "PX ";
}
}
}
// Floating Advertisement
VaR move_ad = Class. Create ();
Move_ad.prototype = {
Initialize: function (imgoption, initposition, delay ){
This. imgoptions = object. Extend ({URL: "", link: "", alt: "", width: 120, height: 120}, imgoption || {});
This. adposition = object. Extend ({left: 40, top: 120}, initposition || {});
This. Delay = delay;
This. Step = 1;
This. herizonflag = true;
This. verticleflag = true;
This. ID = "ad_move_sg ";
VaR vhtmlstring = "<Div id = '" + this. ID + "'style = 'position: absolute; left:" + this. adposition. left + "PX; top:" + this. adposition. top + "PX; width:" + this. imgoptions. width + "PX ;";
Vhtmlstring + = "height:" + this. imgoptions. height + "PX; Z-index: 10; '> <a href ='" + this. imgoptions. link + "'target = '_ blank 'title ='" + this. imgoptions. alt + "'> </a> </div> ";
Document. Write (vhtmlstring );
This. ID = $ (this. ID );
This. intervalid = setinterval (this. Scroll. BIND (this), this. Delay );
This. Id. onmouseover = this. Stop. BIND (this );
This. Id. onmouseout = This. Start. BIND (this );
},
Scroll: function (){
VaR L = T = 0;
VaR B =document.doc umentelement. clientHeight-this.id.offsetHeight;
VaR r=document.doc umentelement. clientWidth-this.id.offsetWidth;
This.id.style.left?this.adposition.left?document.doc umentelement. scrollleft + "PX ";
This.id.style.topw.this.adposition.top?document.doc umentelement. scrolltop + "PX ";
This. adposition. Left = This. adposition. Left + this. Step * (this. herizonflag? 1:-1 );
If (this. adposition. Left <L) {This. herizonflag = true; this. adposition. Left = L ;}
If (this. adposition. Left> r) {This. herizonflag = false; this. adposition. Left = r ;}
This. adposition. Top = This. adposition. Top + this. Step * (this. verticleflag? 1:-1 );
If (this. adposition. Top <= T) {This. verticleflag = true; this. adposition. Top = T ;}
If (this. adposition. Top> = B) {This. verticleflag = false; this. adposition. Top = B ;}
},
Stop: function (){
Clearinterval (this. intervalid );
},
Start: function (){
This. intervalid = setinterval (this. Scroll. BIND (this), this. Delay );
}
}