var no=12;
var speed=10;
var herz="miniherz.gif";
var ns4up=(document.layers)?1:0;
var ie4up=(document.all)?1:0;
var dx, xp, yp;
var am, stx, sty;
var i, doc_width=800, doc_height=600;
if (ns4up) {
  doc_width=self.innerWidth;
  doc_height=self.innerHeight;
} else if (ie4up) {
  doc_width=document.body.clientWidth;
  doc_height=document.body.clientHeight;
}
dx=new Array();
xp=new Array();
yp=new Array();
am=new Array();
stx=new Array();
sty=new Array();
for (i=0;i<no;++i) {
  dx[i]=0;
  xp[i]=Math.random()*(doc_width-50);
  yp[i]=Math.random()*doc_height;
  am[i]=Math.random()*20;
  stx[i]=0.02+Math.random()/10;
  sty[i]=0.7+Math.random();
  if (ns4up) {
    if (i == 0) {
      document.write("<layer name=\"dot"+ i +"\" left=\"32\" ");
      document.write("top=\"32\" visibility=\"show\"><img src=\"");
      document.write(herz + "\" border=\"0\"></layer>");
    } else {
      document.write("<layer name=\"dot"+ i +"\" left=\"32\" ");
      document.write("top=\"32\" visibility=\"show\"><img src=\"");
      document.write(herz + "\" border=\"0\"></layer>");
    }
  } else if (ie4up) {
    if (i == 0) {
      document.write("<div id=\"dot"+ i +"\" style=\"POSITION: ");
      document.write("absolute; Z-INDEX: "+ i +"; VISIBILITY: ");
      document.write("visible; TOP: 32px; LEFT: 32px;\"><img src=\"");
      document.write(herz + "\" border=\"0\"></div>");
    } else {
      document.write("<div id=\"dot"+ i +"\" style=\"POSITION: ");
      document.write("absolute; Z-INDEX: "+ i +"; VISIBILITY: ");
      document.write("visible; TOP: 32px; LEFT: 32px;\"><img src=\"");
      document.write(herz + "\" border=\"0\"></div>");
    }
  }
}
function herzNS() {
  for (i=0;i<no;++i) {
    yp[i]-=sty[i];
    if (yp[i] < -20) {
      xp[i]=Math.random()*(doc_width-am[i]-64);
      yp[i]=doc_height+20;
      stx[i]=0.02 + Math.random()/10;
      sty[i]=0.7 + Math.random();
      doc_width=self.innerWidth;
      doc_height=self.innerHeight;
    }
    dx[i] += stx[i];
    document.layers["dot"+i].top=yp[i];
    document.layers["dot"+i].left=xp[i] + am[i]*Math.sin(dx[i]);
  }
  setTimeout("herzNS()", speed);
}

function herzIE() {
  for (i=0;i<no;++i) {
    yp[i]-=sty[i];
    if (yp[i] < -20) {
      xp[i]=Math.random()*(doc_width-am[i]-20);
      yp[i]=doc_height+20;
      stx[i]=0.02+Math.random()/10;
      sty[i]=0.7+Math.random();
      doc_width=document.body.clientWidth;
      doc_height=document.body.clientHeight;
    }
    dx[i] += stx[i];
    document.all["dot"+i].style.pixelTop=yp[i];
    document.all["dot"+i].style.pixelLeft=xp[i] + am[i]*Math.sin(dx[i]);
  }
  setTimeout("herzIE()", speed);
}

if (ns4up) herzNS();
else if (ie4up) herzIE();