function trim(str)
{
var i = 0;
var len = str.length;
if ( str == "" )
{
return( str );
}
j = len -1;
flagbegin = true;
flagend = true;
while (( flagbegin == true) && (i< len))
{
if ( str.charAt(i) == " " )
{
i=i+1;
flagbegin=true;
}
else
{
flagbegin=false;
}
}
while ((flagend== true) && (j>=0))
{
if (str.charAt(j)==" ")
{
j=j-1;
flagend=true;
}
else
{
flagend=false;
}
}
if ( i > j )
{
return ("");
}
trimstr = str.substring(i,j+1);
return trimstr;
}
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