Script hiệu ứng dàn sao theo trỏ chuột

Đoạn mã javascript tạo hiệu ứng dàn sao nhấp nháy chạy theo con trỏ chuột trong website.




<script type="text/javascript">
//<![CDATA[
imgpre = new Image();
imgpre.scr = "http://1.bp.blogspot.com/-_2RiiqnC8fE/UA4PyyebWBI/AAAAAAAAJE0/3pjVIPJ5XeM/s1600/star01-code1k.com.gif";
imgpre.scr = "http://2.bp.blogspot.com/-MlycfyXDMKU/UA4Pzf222HI/AAAAAAAAJE8/NWXV2xQ6c7E/s1600/star02-code1k.com.gif";
imgpre.scr = "http://1.bp.blogspot.com/-KpNPL0hhrpg/UA4Pz4zoehI/AAAAAAAAJFE/y81fJkgW7Yo/s1600/star03-code1k.com.gif";

YouTarget1k = new Array();
YouTarget1k[0] = "http://1.bp.blogspot.com/-_2RiiqnC8fE/UA4PyyebWBI/AAAAAAAAJE0/3pjVIPJ5XeM/s1600/star01-code1k.com.gif";
YouTarget1k[1] = "http://2.bp.blogspot.com/-MlycfyXDMKU/UA4Pzf222HI/AAAAAAAAJE8/NWXV2xQ6c7E/s1600/star02-code1k.com.gif";
YouTarget1k[2] = "http://1.bp.blogspot.com/-KpNPL0hhrpg/UA4Pz4zoehI/AAAAAAAAJFE/y81fJkgW7Yo/s1600/star03-code1k.com.gif";
var YouTarget1k_s = 2;

setTimeout("YouTarget1kYouTarget1k01()",0);

var userAgent = window.navigator.userAgent.toLowerCase();
var appVersion = window.navigator.appVersion.toLowerCase();

if(document.layers){document.captureEvents(Event.IMGMOVE);}
document.onmousemove=moveImg;

function moveImg(theEvent){
if (userAgent.indexOf("msie") > -1) {
CH01 = document.documentElement.scrollTop;
CH02 = document.body.scrollTop;
if(CH01 > CH02 ){
doc_W = event.clientX + document.documentElement.scrollLeft;
doc_H = event.clientY + document.documentElement.scrollTop;
}else{
doc_W = event.clientX + document.body.scrollLeft;
doc_H = event.clientY + document.body.scrollTop;
}
} else {
doc_W = theEvent.pageX;
doc_H = theEvent.pageY;
}
}

kn=15;
kxp=new Array();
kyp=new Array();
dotk=new Array();
var kp=0;
var doc_W;
var doc_H;
timerID_k=0;
YouTarget1k_n = YouTarget1k_s;

function YouTarget1kYouTarget1k01() {
if(kxp[kn]!=doc_W||kyp[kn]!=doc_H){
kp=kp%kn+1;
kxp[kp] = doc_W;
kyp[kp] = doc_H;
document.getElementById('dotk'+kp).style.visibility='visible';
document.getElementById('dotk'+kp).style.top = kyp[kp]+"px";
document.getElementById('dotk'+kp).style.left = kxp[kp]+"px";
}else{
for(km=1;km<(kn+1);km++){
document.getElementById('dotk'+km).style.visibility='hidden';
}
}
timerID_k=setTimeout("YouTarget1kYouTarget1k01()",100);
}

for (km=1;km<(kn+1);km++){
document.write("<div id=\"dotk"+ km +"\" style=\"position: absolute; z-index: "+ km +" ;visibility:hidden; top: 15px; left: 15px;\"><img src=\"" + YouTarget1k[YouTarget1k_n] + "\" border=\"0\"></div>");
if (YouTarget1k_n == 0) { YouTarget1k_n = YouTarget1k_s; } else { YouTarget1k_n -= 1; }
}


//]]>
</script>