javascript　完美解决对联广告

//
function couplet(){
    if(arguments.length>=1) this.objID = document.getElementById(arguments[0]);
    if(arguments.length>=2) this.divTop = arguments[1];
    if(arguments.length>=3) this.divPlane = arguments[2];
    if(arguments.length>=4) this.scrollDelay = arguments[4];
    if(arguments.length>=5) this.waitTime = arguments[5];
if(!this.objID){
alert("对象名【"+ arguments[0] +"】无效，对联无法初始化，请检查对象名称是否正确！");
this.objID = null; return;
}else{
this.objID.style.position="absolute";
this.objID.style.display="block";
this.objID.style.zIndex=9999;
}
if("" == this.objID.style.top){
if(isNaN(this.divTop)){
alert("对象垂直位置(top)参数必须为数字。"); return;
}else{
this.objID.style.top = this.divTop+"px";
}
}
if("" == this.objID.style.left && "" == this.objID.style.right){
if(isNaN(this.divPlane)){
alert("对象水平位置(left||right)参数必须为数字。"); return;
}
if(this.divPlane>0) this.objID.style.left = this.divPlane+"px";
if(this.divPlane<0) this.objID.style.right = Math.abs(this.divPlane)+"px";
}
if(this.scrollDelay<15 || isNaN(this.scrollDelay)) this.scrollDelay = 15;
if(this.waitTime<500 || isNaN(this.waitTime)) this.waitTime = 500;
if(arguments.length>=1) this.start();
}
couplet.prototype.start = function(){
if(null == this.objID) return;
var objCouplet = this;
timer = this.scrollDelay;
objCouplet.lastScrollY = 0;
objCouplet.timerID = null;
objCouplet.startID = function(){
    if("block" == objCouplet.objID.style.display){
        objCouplet.run();
        }else{
        clearInterval(objCouplet.timerID);
    }
    }
    objCouplet.Begin = function(){
    objCouplet.timerID = setInterval(objCouplet.startID,timer);
} 

    setTimeout(objCouplet.Begin,this.waitTime);
}
couplet.prototype.run = function(){
    if(document.documentElement && document.documentElement.scrollTop){
        uu_scrY = parseFloat(document.documentElement.scrollTop);
        }else if(document.body){
        uu_scrY = parseFloat(document.body.scrollTop);
    }
    uu_divX = parseFloat(this.objID.style.top.replace("px",""));
    uu_curTop = .1 * (uu_scrY - this.lastScrollY);
    uu_curTop = uu_curTop>0?Math.ceil(uu_curTop):Math.floor(uu_curTop);
    this.objID.style.top = parseFloat(uu_divX + uu_curTop) + "px";
    this.lastScrollY += uu_curTop;
}
//
function maple_hide(num){
    document.getElementById("maple"+num).style.display="none";

}
//
function floatjs(){
            new couplet("maple1",100,1);
            new couplet("maple2",450,8);
            new couplet("maple3",100,-8);
            //new couplet("maple4",450,-8);
        }
    if( window.addEventListener) window.addEventListener(‘load‘,floatjs,false);
else window.attachEvent(‘onload‘,floatjs);
//
document.write(‘<div id="maple1"><a href="http://www.k686.com/" target="_blank"><img src="http://www.lygnk.com/images/shinian.jpg"  border="0" /></a><div style="position: absolute;width:30px;height:30px;top:0px;right:5px;cursor:pointer" onclick="maple_hide(1)">XX</div></div>‘);
document.write(‘<div id="maple2"><a href="http://www.k686.com/" target="_blank"><img src="http://www.lygnk.com/images/shinian.jpg"  border="0" /></a><div style="position: absolute;width:30px;height:30px;top:0px;right:5px;cursor:pointer" onclick="maple_hide(2)">XX</div></div>‘);
document.write(‘<div id="maple3"><a href="http://www.k686.com/" target="_blank"><img src="http://www.lygnk.com/images/shinian.jpg"  border="0" /></a><div style="position: absolute;width:30px;height:30px;top:0px;right:5px;cursor:pointer" onclick="maple_hide(3)">XX</div></div>‘);
//document.write(‘<div id="maple4"><a href="http://www.k686.com/" target="_blank"><img src="http://www.lygnk.com/images/shinian.jpg"  border="0" /></a></div>‘);