首页右下角添加宣传视频窗口，要怎么做？ [复制链接]

js为以下代码
<style type="text/css">
#msg_win{border:1px solid #CCFFFF;backgroundFFFFFF;width:302px;position:absolute;right:0;font-size:12px;color000000;font-family:Arial;margin:0px;display:none;overflow:hidden;z-index:99;}#msg_win .icos{position:absolute;top:0px;right:2px;z-index:9;}.icos a{float:left;color833B02;margin:1px;text-align:center;font-weight:bold;width:14px;height:22px;line-height:22px;padding:1px;text-decoration:none;font-family:webdings;}.icos a:hover{colorfff;}#msg_title{backgroundCCFFFF;height:25px;line-height:25px;text-indent:5px;}#msg_content{padding:0px 0px 0px 1px;width:300px;height:251px;overflow:hidden;}
</style><script type="text/javascript">
document.write("<div id='msg_win' style='display:block;top:900px;visibility:visible;opacity:1;'>");document.write("<div class='icos'><a id='msg_min' title='最小化' href='javascript:void 0'>_</a><a id='msg_close' title='关闭' href='javascript:void 0'>×</a></div>");document.write("<div id='msg_title'>视频宣传</div>");document.write("<div id='msg_content'>");document.write("<object classid='clsid27CDB6E-AE6D-11cf-96B8-444553540000' codebase='http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0' width='300' height='250'> ");document.write("<param name='movie' value='http://you.video.sina.com.cn/api/sinawebApi/outplayrefer.php/vid=79823443_1638201462_PEiyGyFsDWXK+l1lHz2stqlF+6xCpv2xhGuyuFqmJQ9dUw6YJMXNb9oO6CvVBMtB5yoUEJU4fPYk1Bkpaw/s.swf>");document.write("<embed src='/img/ad.swf' width='300' height='250' type='application/x-shockwave-flash' />");document.write("</object>");document.write("</div>");document.write("</div>");var Message={setunction(){var set=this.minbtn.status==1?[0,1,'block',this.char[0],'最小化']:[1,0,'none',this.char[1],'恢复'];this.minbtn.status=set[0];this.win.style.borderBottomWidth=set[1];this.content.style.display=set[2];this.minbtn.innerHTML=set[3];this.minbtn.title=set[4];this.win.style.top=this.getY().top;},closeunction(){this.win.style.display='none';window.onscroll=null;},setOpacity: function(x){var v=x>=100?'':'Alpha(opacity='+x+')';this.win.style.visibility = x<=0?'hidden':'visible';this.win.style.filter=v;this.win.style.opacity=x/100;},showunction(){clearInterval(this.timer2);var me=this,fx=this.fx(0,100,0.1),t=0;this.timer2=setInterval(function(){t=fx();me.setOpacity(t[0]);if(t[1]==0){clearInterval(me.timer2)}},10);},fxunction(a,b,c){var cMath=Math[(a-b)>0?"floor":"ceil"],c=c||0.1;return function(){return[a+=cMath((b-a)*c),a-b]}},getYunction(){var d=document,b=document.body,e=document.documentElement;var s=Math.max(b.scrollTop,e.scrollTop);var h=/BackCompat/i.test(document.compatMode)?b.clientHeight:e.clientHeight;var h2=this.win.offsetHeight;return{foot:s+h+h2+'px',top:s+h-h2+'px'}},moveTounction(y){clearInterval(this.timer);var me=this,a=parseInt(this.win.style.top)||0;var fx=this.fx(a,parseInt(y));var t=0;this.timer=setInterval(function(){t=fx();me.win.style.top=t[0]+'px';if(t[1]==0){clearInterval(me.timer);me.bind();}},10);},bindunction(){var me=this,st,rt;window.onscroll=function(){clearTimeout(st);clearTimeout(me.timer2);me.setOpacity(0);st=setTimeout(function(){me.win.style.top=me.getY().top;me.show();},600);};window.onresize=function(){clearTimeout(rt);rt=setTimeout(function(){me.win.style.top=me.getY().top},100);}},initunction(){function $(id){return document.getElementById(id)};this.win=$('msg_win');var set={minbtn:'msg_min',closebtn:'msg_close',title:'msg_title',content:'msg_content'};for(var Id in set){this[Id]=$(set[Id])};var me=this;this.minbtn.onclick=function(){me.set();this.blur()};this.closebtn.onclick=function(){me.close()};this.char=(!!(document.all&&navigator.userAgent.indexOf('Opera')===-1))?['0','2','r']:['─','〓','×'];this.minbtn.innerHTML=this.char[0];this.closebtn.innerHTML=this.char[2];setTimeout(function(){me.win.style.display='block';/*me.win.style.top=me.getY().foot;*/me.win.style.top= me.getY().top;me.moveTo(me.getY().top);},0);return this;}};Message.init();
</script>

请问前端调用以上js代码，需要放在哪里才能显示出来？