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function UrlEncode(str)
{
var ret="";
var strSpecial="!\"#$%&()*+,/:;<=>?[]^`{|}~%"; var tt="";
for(var i=0;i<str.length;i++)
{
var chr = str.charAt(i);
var c=str2asc(chr);
tt += chr+":"+c+"n";
if(parseInt("0x"+c) > 0x7f)
{
ret+="%"+c.slice(0,2)+"%"+c.slice(-2);
}
else
{
if(chr==" ")
ret+="+";
else if(strSpecial.indexOf(chr)!=-1)
ret+="%"+c.toString(16);
else
ret+=chr;
}
}
return ret;
}

UrlDecode
function UrlDecode(str){
var ret="";
for(var i=0;i<str.length;i++)
{
var chr = str.charAt(i);
if(chr == "+")
{
ret+=" ";
}
else if(chr=="%")
{
var asc = str.substring(i+1,i+3);
if(parseInt("0x"+asc)>0x7f)
{
ret+=asc2str(parseInt("0x"+asc+str.substring(i+4,i+6)));
i+=5;
}
else
{
ret+=asc2str(parseInt("0x"+asc));
i+=2;
}
}
else
{
ret+= chr;
}
}
return ret;
}

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new function() {
    // private static fields
    var s_first = 1;
    var s_second = 2;
 
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http://tetlaw.id.au/view/blog/table-sorting-with-prototype/
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http://www.kryogenix.org/code/browser/sorttable/
4. Table Sorting Javascript
http://yoast.com/articles/sortable-table/
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extract($_GET);
//unicodeתutf8£¬Èç:&#20013»ò \u9865  ×ª ³É ÖÐÎÄ
function unescape($str) {
    $str = rawurldecode($str);
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