var computer=[“Dell”,”Gateway”,”Apple”,”IBM”,”HP”];
 alert(computer.slice(2,4));

<script type="text/JavaScript">
function ValidateField()
{
        if(document.forms[0].txtId.value =="")
                {return false;}

        return true;
}
</script>

<script type="text/javascript">  
  var text = "This is a text";  
  var result = text.split(" "); 
   document.write(result); 
</script>

<script type="text/javascript">   
 var s= "Good 100%";  
 var pattern = /\D/g;   
 var output= s.match(pattern);  
 document.write(output); 
</script>

<script type="text/javascript">   
var text="This is a text";   
alert(text.charAt(text.length-1));
 </script>

<script type="text/javascript">   
document.write(2+5+"8"); 
</script>

<script type="text/javascript">

  document.write(parseFloat(9+10));

</script>

<script type="text/javascript">

function sum(x){
   function add(y){
     return x+y;
   }
   return add;
}

function callme(){
  result=sum(5)(5);
  alert(result);
}

callme();

</script>

<script type="text/javascript">  
    var text = "This is a text";   
    var pattern = /is/;  
    var output= text.search(pattern);
    document.write("Position: " + output); 
</script>