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var arr = [
[1,2,3,4,5],
[6,7,8,9,10],
[11,12,13,14,15],
[16,17,18,19,20],
[21,22,23,24,25]
for(var i=0; i<arr.length;i++){
var newArr=arr[i];
var max=newArr.length-1;
for(var j==0;j<=max;j++){
if(j<max-i)
document.write(" ")
else{
document.write(newArr[j]+" ");
}
document.write("<br/>");
}
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生活学无止境,快乐而简单!