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var o = ['Äã', 'da', 'Äã', 123, 'fm', 'fm', 'da', 123, 'fm', 123];
var n = [];
var s = -1;
var t = null;
o.sort();

for(var i = 0; i < o.length; i++)
{
if(o[i] != t)
{
s += 1;
n[s] = [];
}
n[s][n[s].length] = t = o[i];
}
for(var i = 0; i < n.length; i++)
{
alert(n[i]);
}


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 µÚÒ»ÖÖ£¬ÀûÓÃmath.round 
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1) //round "original" to two decimals
var result=Math.round(original*100)/100;  //returns 28.45
2) // round "original" to 1 dec ......

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<script>
    function getkey(e)
    {
        var key;
        if(document.all)
        {
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