<script language="javascript">
<!--String.prototype.unique = function(){
var out = "";
for(var i=0;i<this.length;i++)
{
if(out.indexOf(this.charAt(i)) == -1 )
out += this.charAt(i);
}
return out;
}var str = "abcabcd";
alert(str.unique());
//-->
</script>
<!--String.prototype.unique = function(){
var out = "";
for(var i=0;i<this.length;i++)
{
if(out.indexOf(this.charAt(i)) == -1 )
out += this.charAt(i);
}
return out;
}var str = "abcabcd";
alert(str.unique());
//-->
</script>
var str="abcabcd";
var temp="";
while(str.length>0)
{
var getChar=new RegExp(str.charAt(0),"ig");
temp+=str.charAt(0);
str=str.replace(getChar,'');
}
alert(temp);
</script>