Sorting an array elements

Procedure:
step 1: Open flash 8
step 2: Select flash document
step 3: select 1st layer, 1st frame on that document and write source code on Actions Frame
step 4: To check output press ctrl+enter(test movie)

SourceCode:
var a:Array=[20,10,5,55,6];
var n=a.length;
for(var i=0;i
{
 for(var j=0;j
 {
  if(a[i]
  {
    var tmp=a[i];
    a[i]=a[j];
    a[j]=tmp;
   }
  }
}

trace("after sorting:");
for(var i=0;i
{
 trace(a[i]);
}
var l=0;
var n=a.length,h=n,m=int((l+h)/2),f=0,key=55;
while(l<=m)
{
 if(key==a[m])
 {
  var f=1;
  break;
 }
 else if(key>a[m])
 {
   l=m+1;
   m=int((l+h)/2);
  }
 else
 {
   h=m-1;
   m=int((l+h)/2);
  }
}
trace("given key="+key);
if(f==1)
trace("element found");
else
trace("element not found");