var delay = 2800; //set delay between message change (in miliseconds)
var maxsteps=30; // number of steps to take to change from start color to endcolor
var stepdelay=40; // time in miliseconds of a single step
//**Note: maxsteps*stepdelay will be total time in miliseconds of fading effect
var startcolor= new Array(255,255,255); // start color (red)，起始颜色，默认是无色
var endcolor=new Array(255,0,0); // end color (red)，结束颜色，如果不屏蔽后面的3条无效
var elecolor=new Array(255,0,0,51,51,255,113,113,198,186,85,211,255,140,0); 
//上句单独指定颜色时用，3个数一组，分别对应相应条目，默认颜色红，浅绿，蓝，紫，橙
var fcontent=new Array();
begintag='<div style="font: normal 12px Arial; padding: 5px;">'; //set opening tag, such as font declarations

fcontent[0]="<a href='/cgi-bin/bbs/bbsdoc?board=WindowsofNK'style='text-decoration:none;'><b>【公    告】我爱南开站祝各位网友新学期学习顺利</b></a>";
fcontent[1]="<a href='/cgi-bin/bbs/bbsdoc?board=sysop'style='text-decoration:none;'><b>【公    告】我爱南开站祝各位网友新学期新气象</b></a>";


closetag='</div>';
var fwidth='600px'; //set scroller width
var fheight='25px'; //set scroller height
var fadelinks=1; //should links inside scroller content also fade like text? 0 for no, 1 for yes.
///No need to edit below this line/////////////////

var ie4=document.all&&!document.getElementById;
var DOM2=document.getElementById;
var faderdelay=0;
var index=0;

/*Rafael Raposo edited function*/
//function to change content
function changecontent(){
var obj=document.getElementById("fscroller");
if (index>=fcontent.length) {
index=0; }
//下面3行单独指定颜色，如不需要可以屏蔽
endcolor[0]=elecolor[index*3];
endcolor[1]=elecolor[index*3+1];
endcolor[2]=elecolor[index*3+2];

if (DOM2){
document.getElementById("fscroller").style.color="rgb("+startcolor[0]+", "+startcolor[1]+", "+startcolor[2]+")"
document.getElementById("fscroller").innerHTML=begintag+fcontent[index]+closetag
if (fadelinks)
linkcolorchange(1);
colorfade(1, 15);
}
else if (ie4)
document.all.fscroller.innerHTML=begintag+fcontent[index]+closetag;
index++
}
// colorfade() partially by Marcio Galli for Netscape Communications. ////////////
// Modified by Dynamicdrive.com
function linkcolorchange(step){
var obj=document.getElementById("fscroller").getElementsByTagName("A");
if (obj.length>0){
for (i=0;i<obj.length;i++)
obj[i].style.color=getstepcolor(step);
}
}
/*Rafael Raposo edited function*/
var fadecounter;
function colorfade(step) {
if(step<=maxsteps) { 
document.getElementById("fscroller").style.color=getstepcolor(step);
if (fadelinks)
linkcolorchange(step);
step++;
fadecounter=setTimeout("colorfade("+step+")",stepdelay);
}else{
clearTimeout(fadecounter);
document.getElementById("fscroller").style.color="rgb("+endcolor[0]+", "+endcolor[1]+", "+endcolor[2]+")";
setTimeout("changecontent()", delay);
} 
}
/*Rafael Raposo's new function*/
function getstepcolor(step) {
var diff
var newcolor=new Array(3);
for(var i=0;i<3;i++) {
diff = (startcolor[i]-endcolor[i]);
if(diff > 0) {
newcolor[i] = startcolor[i]-(Math.round((diff/maxsteps))*step);
} else {
newcolor[i] = startcolor[i]+(Math.round((Math.abs(diff)/maxsteps))*step);
}
}
return ("rgb(" + newcolor[0] + ", " + newcolor[1] + ", " + newcolor[2] + ")");
}
if (ie4||DOM2)
document.write('<div id="fscroller" align="center" style="border:none ;width:'+fwidth+';height:'+fheight+'"></div>');
if (window.addEventListener)
window.addEventListener("load", changecontent, false)
else if (window.attachEvent)
window.attachEvent("onload", changecontent)
else if (document.getElementById)
window.onload=changecontent