var ary=[1,2,3,3,2,3,4,5];for(var i=0;i<ary.length;i++){  for(var j=i+1;j<ary.length;j++){    if(ary[i]===ary[j]){      ary.splice(i,1);      i--;    }  }}alert(ary);

var ary=[1,2,3,3,2,3,4,5];var ary1=[];for(var i=0;i<ary.length;i++){ if(ary1.indexOf(ary[i])==-1){ ary1.push(ary[i]); }}alert(ary1);

var ary=[1,2,3,3,2,3,4,5]; var obj={}; for(var i=0;i<ary.length;i++){  var cur=ary[i];  if(obj[cur]){  obj[cur]++;  }else{  obj[cur]=1;  } } var ary=[]; for(var attr in obj){  ary.push(attr); } alert(ary);

var ary=[1,2,3,3,2,3,4,5]; ary.sort(function(a,b){return a-b;}); for(var i=0;i<ary.length;i++){  if(ary[i]===ary[i+1]){  ary.splice(i,1);  i--;  } } alert(ary);