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if (document.all)
{
yourLogo = "»¶Ó½øÈëÏÊ»¨¹¤·»Íø£¡"; <!--´ýÐýתµÄÎÄ×Ö-->
logoFont = "Arial"; <!--ÎÄ×ÖµÄ×ÖÌå-->
logoColor = "blue"; <!--ÎÄ×ÖµÄÑÕÉ«-->
yourLogo = yourLogo.split(''); <!--½«ÐýתµÄ×Ö·û´®·Ö³Éµ¥¸öµÄ×Ö·û-->
L = yourLogo.length; <!--»ñµÃ×Ö·û´®µÄ³¤¶È-->
TrigSplit = 360 / L; <!--ÉèÖÃÿ´ÎÐýתµÄ½Ç¶È-->
Sz = new Array() <!--ÉùÃ÷Ò»¸öÊý×é-->
logoWidth = 100; <!--¶¨Òå¿í¶È-->
logoHeight = -30; <!--¶¨Òå¸ß¶È-->
ypos = 0;
xpos = 0;
step = 0.03;  
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concat
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var a = "hello";
var b = ",world";
var c = a.concat(b);
alert(c);
//c = "hello,world"
indexOf
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var index1 = a.indexOf("l");
//index1 ......
//set cookie
function setcookie(name,value){
var Days = 30;
var exp = new Date();
exp.setTime(exp.getTime() + Days*24*60*60*1000);
document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
}
function getcookie(name) ......