wwd/wwdeath/trail.js

// <![CDATA[
    var colour="random"; // in addition to "random" can be set to any valid colour eg "#f0f" or "red"
    var sparkles=50;
    
    /****************************
    *  Tinkerbell Magic Sparkle *
    *(c)2005-13 mf2fm web-design*
    *  http://www.mf2fm.com/rv  *
    * DON'T EDIT BELOW THIS BOX *
    ****************************/
    var x=ox=400;
    var y=oy=300;
    var swide=800;
    var shigh=600;
    var sleft=sdown=0;
    var tiny=new Array();
    var star=new Array();
    var starv=new Array();
    var starx=new Array();
    var stary=new Array();
    var tinyx=new Array();
    var tinyy=new Array();
    var tinyv=new Array();
    
    window.onload=function() { if (document.getElementById) {
      var i, rats, rlef, rdow;
      for (var i=0; i<sparkles; i++) {
        var rats=createDiv(3, 3);
        rats.style.visibility="hidden";
        rats.style.zIndex="999";
        document.body.appendChild(tiny[i]=rats);
        starv[i]=0;
        tinyv[i]=0;
        var rats=createDiv(5, 5);
        rats.style.backgroundColor="transparent";
        rats.style.visibility="hidden";
        rats.style.zIndex="999";
        var rlef=createDiv(1, 5);
        var rdow=createDiv(5, 1);
        rats.appendChild(rlef);
        rats.appendChild(rdow);
        rlef.style.top="2px";
        rlef.style.left="0px";
        rdow.style.top="0px";
        rdow.style.left="2px";
        document.body.appendChild(star[i]=rats);
      }
      set_width();
      sparkle();
    }}
    
    function sparkle() {
      var c;
      if (Math.abs(x-ox)>1 || Math.abs(y-oy)>1) {
        ox=x;
        oy=y;
        for (c=0; c<sparkles; c++) if (!starv[c]) {
          star[c].style.left=(starx[c]=x)+"px";
          star[c].style.top=(stary[c]=y+1)+"px";
          star[c].style.clip="rect(0px, 5px, 5px, 0px)";
          star[c].childNodes[0].style.backgroundColor=star[c].childNodes[1].style.backgroundColor=(colour=="random")?newColour():colour;
          star[c].style.visibility="visible";
          starv[c]=50;
          break;
        }
      }
      for (c=0; c<sparkles; c++) {
        if (starv[c]) update_star(c);
        if (tinyv[c]) update_tiny(c);
      }
      setTimeout("sparkle()", 40);
    }
    
    function update_star(i) {
      if (--starv[i]==25) star[i].style.clip="rect(1px, 4px, 4px, 1px)";
      if (starv[i]) {
        stary[i]+=1+Math.random()*3;
        starx[i]+=(i%5-2)/5;
        if (stary[i]<shigh+sdown) {
          star[i].style.top=stary[i]+"px";
          star[i].style.left=starx[i]+"px";
        }
        else {
          star[i].style.visibility="hidden";
          starv[i]=0;
          return;
        }
      }
      else {
        tinyv[i]=50;
        tiny[i].style.top=(tinyy[i]=stary[i])+"px";
        tiny[i].style.left=(tinyx[i]=starx[i])+"px";
        tiny[i].style.width="2px";
        tiny[i].style.height="2px";
        tiny[i].style.backgroundColor=star[i].childNodes[0].style.backgroundColor;
        star[i].style.visibility="hidden";
        tiny[i].style.visibility="visible";
      }
    }
    
    function update_tiny(i) {
      if (--tinyv[i]==25) {
        tiny[i].style.width="1px";
        tiny[i].style.height="1px";
      }
      if (tinyv[i]) {
        tinyy[i]+=1+Math.random()*3;
        tinyx[i]+=(i%5-2)/5;
        if (tinyy[i]<shigh+sdown) {
          tiny[i].style.top=tinyy[i]+"px";
          tiny[i].style.left=tinyx[i]+"px";
        }
        else {
          tiny[i].style.visibility="hidden";
          tinyv[i]=0;
          return;
        }
      }
      else tiny[i].style.visibility="hidden";
    }
    
    document.onmousemove=mouse;
    function mouse(e) {
      if (e) {
        y=e.pageY;
        x=e.pageX;
      }
      else {
        set_scroll();
        y=event.y+sdown;
        x=event.x+sleft;
      }
    }
    
    window.onscroll=set_scroll;
    function set_scroll() {
      if (typeof(self.pageYOffset)=='number') {
        sdown=self.pageYOffset;
        sleft=self.pageXOffset;
      }
      else if (document.body && (document.body.scrollTop || document.body.scrollLeft)) {
        sdown=document.body.scrollTop;
        sleft=document.body.scrollLeft;
      }
      else if (document.documentElement && (document.documentElement.scrollTop || document.documentElement.scrollLeft)) {
        sleft=document.documentElement.scrollLeft;
        sdown=document.documentElement.scrollTop;
      }
      else {
        sdown=0;
        sleft=0;
      }
    }
    
    window.onresize=set_width;
    function set_width() {
      var sw_min=999999;
      var sh_min=999999;
      if (document.documentElement && document.documentElement.clientWidth) {
        if (document.documentElement.clientWidth>0) sw_min=document.documentElement.clientWidth;
        if (document.documentElement.clientHeight>0) sh_min=document.documentElement.clientHeight;
      }
      if (typeof(self.innerWidth)=='number' && self.innerWidth) {
        if (self.innerWidth>0 && self.innerWidth<sw_min) sw_min=self.innerWidth;
        if (self.innerHeight>0 && self.innerHeight<sh_min) sh_min=self.innerHeight;
      }
      if (document.body.clientWidth) {
        if (document.body.clientWidth>0 && document.body.clientWidth<sw_min) sw_min=document.body.clientWidth;
        if (document.body.clientHeight>0 && document.body.clientHeight<sh_min) sh_min=document.body.clientHeight;
      }
      if (sw_min==999999 || sh_min==999999) {
        sw_min=800;
        sh_min=600;
      }
      swide=sw_min;
      shigh=sh_min;
    }
    
    function createDiv(height, width) {
      var div=document.createElement("div");
      div.style.position="absolute";
      div.style.height=height+"px";
      div.style.width=width+"px";
      div.style.overflow="hidden";
      return (div);
    }
    
    function newColour() {
      var c=new Array();
      c[0]=255;
      c[1]=Math.floor(Math.random()*256);
      c[2]=Math.floor(Math.random()*(256-c[1]/2));
      c.sort(function(){return (0.5 - Math.random());});
      return ("rgb("+c[0]+", "+c[1]+", "+c[2]+")");
    }
    // ]]>