自己写的一个jQuery对联广告插件

;(function($){
$.extend({
dLAdv:function(options){
var defaults={
leftType:0,//左边广告图片效果0稳固不动,1缓慢复位
rightType:0,//右边广告图片的效果0稳固不动,1缓慢复位
leftTime:300,//左边复位时间
rightTime:300,//右边复位时间
leftCloseTime:1000,//左边关闭时间
rightCloseTime:1000,//右边关闭时间
leftToTop:200,//左边广告top
leftToLeft:0,//左边广告离浏览器左边距离
rightToTop:200,//右边广告top
rightToRight:0,//右边广告离浏览器有变距离
leftAdvStr:0,//左边的广告,1有,0无
rightAdvStr:0,//右边的广告,1有,0无
leftWidth:140,//左边广告宽度
leftHeight:200,//左边广告高度
rightWidth:140,//右边广告宽度
rightHeight:200,//右边广告高度
leftSrc:"dlAdvPic.jpg",//左边图片路径
leftAlt:"advertising",//左边广告图片的alt值
rightSrc:"dlAdvPic.jpg",//右边图片路径
rightAlt:"advertising",//右边广告图片的alt值
leftZindex:800,//左边层级
rightZindex:800,//右边层级
strClose:"关闭",
//下面2项不做参数给出
leftClass:"dlBoxLeft",//左边class
rightClass:"dlBoxRight"//右边class
}
options= $.extend(defaults,options);
var html="";
if(options.leftAdvStr===1){
html+="<div class="+options.leftClass+">";
html+="<div class='dlAdvLeftImgBox'><img class='dlAdvleftImg' src="+options.leftSrc+" alt="+options.leftAlt+"></div>";
html+="<div class='dlAdvCloseDiv'><a class='dlAdvClose dlAdvLeftClose'>"+options.strClose+"</a></div>";
html+="</div>";
}
if(options.rightAdvStr===1){
html+="<div class="+options.rightClass+">";
html+="<div class='dlAdvRightImgBox'><img class='dlAdvRightImg' src="+options.rightSrc+" alt="+options.rightAlt+"></div>";
html+="<div class='dlAdvCloseDiv'><a class='dlAdvClose dlAdvRightClose'>"+options.strClose+"</a></div>";
html+="</div>";
}
$("body").append(html);
$(".dlAdvLeftClose,.dlAdvRightClose").on("click",function(){
if($(this).is(".dlAdvLeftClose"))
$("."+options.leftClass).fadeOut(options.leftCloseTime,function(){
$(this).remove();
});
else if($(this).is(".dlAdvRightClose"))
$("."+options.rightClass).fadeOut(options.rightCloseTime,function(){
$(this).remove();
});
})

var leftAdv=$("."+options.leftClass),
rightAdv=$("."+options.rightClass),
dlAdvCloseHeight=$(".dlAdvCloseDiv").eq(0).outerHeight();
leftAdv.css({"z-index":options.leftZindex});
rightAdv.css({"z-index":options.rightZindex});
function changeImgSize(imgObj,width,height){
height-=dlAdvCloseHeight;
imgObj.parent().width(width).height(height);
imgObj.css({height:"100%",width:"100%"});
}
function getAdvTop(pos,type){//pos,左,右,type,效果
if(type===0){
if(pos==="left"){
return {top:options.leftToTop+"px"};
}
else if(pos==="right"){
return {top:options.rightToTop+"px"};
}
}
else if(type===1){
var scrollTop=$(window).scrollTop();
var top=0;
if(pos==="left"){
top=options.leftToTop+scrollTop;
return {top:top+"px"};
}
else if(pos==="right"){
top=options.rightToTop+scrollTop;
return {top:top+"px"};
}

}
else{alert("方法getAdvTop的type有误")}
}
var leftAdvSize={width:options.leftWidth+"px",height:options.leftHeight+"px"};
var rightAdvSize={width:options.rightWidth+"px",height:options.rightHeight+"px"};
var leftAdvPos={left:options.leftToLeft+"px"};
var rightAdvPos={right:options.rightToRight+"px"};
changeImgSize($(".dlAdvleftImg"),options.leftWidth,options.leftHeight);
changeImgSize($(".dlAdvRightImg"),options.rightWidth,options.rightHeight);
function scrollMove(num){//num是数值,不同的数值表示的不同的缓慢恢复的对象
$(window).scroll(function(){
var scrollTop=$(window).scrollTop(),top=0;
if(num===-1){//左边
top=scrollTop+options.leftToTop;
setTimeout(function(){
leftAdv.css({top:top+"px"});
},options.leftTime);
}
else if(num===1){//右边
top=options.rightToTop+scrollTop;
// rightAdv.animate({top:top+"px"},1000)
setTimeout(function(){
//rightAdv.animate({top:top+"px"},1000)
rightAdv.css({top:top+"px"});
},options.rightTime)

}
else if(num===2){//两边
var leftTop=scrollTop+options.leftToTop;
var rightTop=scrollTop+options.rightToTop;
setTimeout(function(){
leftAdv.css({top:leftTop+"px"});
},options.leftTime)
setTimeout(function(){
rightAdv.css({top:rightTop+"px"});
},options.rightTime);
}
});
}
var whoMove=0;//0,都不缓慢移动,-1,左边缓慢移动,1表示右边缓慢移动,2表示都移动
if(options.leftType===0){//稳固不动
leftAdv.css({"position":"fixed"}).css(getAdvTop("left",options.leftType)).css(leftAdvSize).css(leftAdvPos);
}
else if(options.leftType===1){//缓慢恢复
leftAdv.css({"position":"absolute"}).css(getAdvTop("left",options.leftType)).css(leftAdvSize).css(leftAdvPos);
whoMove=-1;
}
else {
alert("左对联广告的效果参数传递有误");
}
if(options.rightType===0){
rightAdv.css({"position":"fixed"}).css(getAdvTop("right",options.rightType)).css(rightAdvSize).css(rightAdvPos);
}
else if(options.rightType===1){
rightAdv.css({"position":"absolute"}).css(getAdvTop("right",options.rightType)).css(rightAdvSize).css(rightAdvPos);
whoMove=(whoMove===0?1:2);
}
else {
alert("右对联广告的效果参数传递有误");
}
if(whoMove===0){}//都不缓慢恢复
else if(whoMove===-1){//左边缓慢移动
scrollMove(whoMove);
}
else if(whoMove===1){//右边缓慢移动
scrollMove(whoMove)
}
else if(whoMove===2){//左右都缓慢移动
scrollMove(whoMove)
}
}
});
})(jQuery);

.dlBoxLeft{ border:1px solid #ccc;padding:3px;background-color:#efefef; }
.dlBoxRight{border:1px solid #ccc;padding:3px; background-color:#efefef;}
.dlAdvLeftImgBox{ }
.dlAdvCloseDiv{background-image:url(dlCloseBj.jpg);background-repeat:repeat-x;height:25px;border-top:1px solid #ccc; margin-top:3px;}
.dlAdvClose{ /*width:auto; display:block;*/ font-size:12px; font-family:"宋体"; cursor:pointer;background-image:url(dlClosebutton.jpg); background-repeat:no-repeat; display:block;width:52px; height:19px; margin:0 auto; margin-top:3px;color:#7f7c7c; padding-left:8px; font-weight:bold; padding-top:1px; text-align:center; line-height:19px;}

$(function(){
$.dLAdv({leftAdvStr:1,leftType:0,rightAdvStr:1,rightType:1});
})

<div style="height:10000px;"> </div>