[Couplet Advertisement] JS script class_javascript skills

//************************************************ ****************************************
//& Author: Wow Fish
//& Date: December 31, 2004
//& Website: http://www.13smile.com/
//& Blog: http://blog.csdn.net/ bpfish
//& Name: [Couplet Advertisement] JS Script Class
//& Function: Display the couplet advertisement on the page
//& Method:
//& SmileAdver.setLeftPos(10); //Set the position of the left couplet from the left side of the page (PX)
//& SmileAdver.setLeftTop(150); //Set the position of the left couplet from the top of the page (PX)
//& SmileAdver.setRightPos (10); // Set the position on the right side of the right side of the right side (PX)
// & Smileadver.setRighttop (150); // Set the position of the right pair of pairing distance (px)
// & SmileAdver.addLeftImage(link, image address, link target, image tip); //Add the image of the left couplet ad
//& SmileAdver.addRightImage(link, image address, link target, image tip); //Add The picture of the couplet advertisement on the right
//& SmileAdver.scroll();                                                                                                                                                                                                    . *************************************************** *********************
function SmileAdver_Class(){
var leftImageArray = new Array(); //Save the left advertising image array
var rightImageArray = new Array(); //Save the right ad image array
var leftPos,rightPos; )
var leftTop,rightTop; //leftTop = The position of the left ad from the top sidebar (px) rightTop = The position of the right ad from the top sidebar (px)
var lastScrollY=0;
leftPos = rightPos = 10;               //The default is 10
leftTop = rightTop = 150; /If it is not a number, the default is 10
leftPos = value;
}
this.setRightPos = function(value){
if(isNaN(value)){value = 10;} //Non-number The default is 10
rightPos = value;
}
this.setLeftTop = function(value){
if(isNaN(value)){value = 150;} //The default is for non-numbers 150
leftTop = value;
}
this.setRightTop = function(value){
if(isNaN(value)){value = 150;} //Non-number, the default is 150
rightTop = value;
}
//Add the image advertisement on the left addLeftImage (link, image address, link target, image prompt)
this.addLeftImage = function(href, image, target, title){
var imageArray = getImageArray(href,image,target,title);
if(imageArray != null){
leftImageArray[leftImageArray.length] = imageArray;
}
}
//Add the image advertisement on the right addRightImage (link, image address, link target, image prompt)
this.addRightImage = function(href,image,target,title){
var imageArray = getImageArray(href,image ,target,title);
if(imageArray != null){
rightImageArray[rightImageArray.length] = imageArray;
}
}
//Add advertising images internally, if not Image address, returns a null value, otherwise returns an array
function getImageArray(href,image,target,title){
if(image == undefined){return null;} Add
if(target == undefined || target == ""){target == "_blank"}; //The default is _blank opening method
target =" target="" target """;
if(title == undefined){ //Advertising image title prompt
title = "";
}else{
title = "title="" title """;
}
//If the link starts with www., it will automatically add http:// (otherwise, the link will be wrong)
if(href.toLowerCase().substring(0,4) == "www."){
href = "http://"; href;
}
if(image. toLowerCase().substring(0,4) == "www."){
image = "http://"; image;
}
return new Array(href,image,target,title ; Variable)
function showImageDiv(div,pos,posPX,topPx,imageArray){
var j;
document.write("
");
for(j=0; j document.write("
"); if(j != imageArray.length-1){document.write(" ");}
}

document.write("
");
} //Scrolling advertising couplet image
this.scroll = function(){
showImageDiv ("smilediv1","left",leftPos,leftTop,leftImageArray);
showImageDiv("smilediv2","right",rightPos,rightTop,rightImageArray);
window.setInterval(scrollImage,1);
}
//Internally used to scroll advertising images
function scrollImage(){
var diffY,percent;
diffY=document.body.scrollTop;
percent=.1*( diffY-lastScrollY);
if(percent>0)percent=Math.ceil(percent);
else percent=Math.floor(percent);
document.all.smilediv1.style.pixelTop =percent ;
document.all.smilediv2.style.pixelTop =percent;
lastScrollY=lastScrollY percent;
}
}
/////////////// //////////////////////////////End of class///////////////////// //////////////////////////////////////////////
/// //////Class usage sample code////////////////////////////////////////// /////////
var SmileAdver = new SmileAdver_Class();
SmileAdver.setLeftPos(10);
SmileAdver.setRightPos(10);
SmileAdver.setLeftTop(150);
SmileAdver.setRightTop(150);
SmileAdver.addLeftImage("http://www.138tips.com/","http://www.88ball.com/images/138tips.gif";," ","asdfasdf");
SmileAdver.addLeftImage("http://www.138tips.com/","http://www.88ball.com/images/138tips.gif");
SmileAdver .addLeftImage("http://www.138tips.com/","http://www.88ball.com/images/138tips.gif");
SmileAdver.addRightImage("http://www.138tips .com/","http://www.88ball.com/images/138tips.gif");
SmileAdver.addRightImage("http://www.138tips.com/","http://www .88ball.com/images/138tips.gif");
SmileAdver.addRightImage("http://www.138tips.com/","http://www.88ball.com/images/138tips.gif" );
SmileAdver.scroll();