网页最顶部转瞬即逝的巨幅广告特效

纯JS调用，在合适的位置自行添加。


<!--首页全屏开始-->
<center>
<script language="JavaScript">
<!--
SYFS=true
var adInterPath="/AD/UploadAdPic/TopFullScreen/qp.jpg"
if (document.all) {
// this is a 4.x browser, no?
document.write('<SCRI' + 'PT LANGUAGE="javascript1.2"');
document.writeln(' SRC="js/TopFullScreen.js"></SCR' + 'IPT>');
}
// -->
</script>       
<DIV ID="hiddenLayer" style="display: none; height: 500px;">
<script language="Javascript">
<!--
        if (getsGlu) {
                expandableIframe = '<IFRAME id="FSFrame" width=760 HEIGHT=500 NORESIZE SCROLLING=No FRAMEBORDER=0 MARGINHEIGHT=0 MARGINWIDTH=0></IFRAME>';
                document.write(expandableIframe);
        }
// -->
</script>
</div>
<!--首页全屏结束-->

把下面的代码保存为TopFullScreen.js


var ads_agt=navigator.userAgent.toLowerCase();
var ads_is_major = parseInt(navigator.appVersion);

var ads_is_ie   = ((ads_agt.indexOf("msie") != -1) && (ads_agt.indexOf("opera") == -1) && (ads_agt.indexOf("omniweb") == -1));
var ads_is_ie3  = (ads_is_ie && (ads_is_major < 4));
var ads_is_ie4  = (ads_is_ie && (ads_is_major == 4) && (ads_agt.indexOf("msie 5")==-1) && (ads_agt.indexOf("msie 6")==-1));
var ads_is_ie4up  = (ads_is_ie  && (ads_is_major >= 4));
var ads_is_ie5  = (ads_is_ie && (ads_is_major == 4) && (ads_agt.indexOf("msie 5.0")!=-1) );
var ads_is_ie5up  = (ads_is_ie  && !ads_is_ie3 && !ads_is_ie4);
var ads_is_ie5_1_macbeta = (ads_is_ie && (ads_agt.indexOf("mac")!=-1) && (ads_agt.indexOf("5.1b")!=-1));

var ads_is_nav  = ((ads_agt.indexOf('mozilla')!=-1) && (ads_agt.indexOf('spoofer')==-1)
                        && (ads_agt.indexOf('compatible') == -1) && (ads_agt.indexOf('opera')==-1)
                        && (ads_agt.indexOf('webtv')==-1));
var ads_is_nav6 = (ads_is_nav && (ads_agt.indexOf("netscape6")!=-1) && (ads_agt.indexOf("6.1")==-1));
var ads_is_nav6up = (ads_is_nav && !ads_is_nav4 && !ads_is_nav3 && !ads_is_nav2);
var ads_is_nav6_1 = (ads_is_nav && (ads_agt.indexOf("netscape6")!=-1) && (ads_agt.indexOf("6.1")!=-1));
var ads_is_nav6_1up = (ads_is_nav && !ads_is_nav6 && !ads_is_nav4 && !ads_is_nav3 && !ads_is_nav2);


getsGlu = ((ads_is_ie5up && !ads_is_ie5_1_macbeta) || ads_is_nav6_1up);


//function changediv(depth)
//{
//        divAll.style.zIndex=depth
//        }
function changediv()
{
        document.getElementById('hiddenLayer').style.display = "block";
        document.getElementById('FSFrame').src = adInterPath;
        setTimeout("hidediv()",5000)
}
function hidediv()
{
        document.getElementById('hiddenLayer').style.display="none";
        SYtag=2;
}
function showfull()
{
setTimeout("changediv()",2000);
}
showfull()