var x = 6;

            var y = 2;

            function sum(a,b){
                var r = 2;
                document.write((a+b)*r+'<br>');
            }

            function multiple(a,b){
                document.write(a*b +'<br>');
            }

            document.write('Debugging <br>');

            sum(2,6);

            multiple(2,5);

            alert('Alert Message');

            var arr1 = ['hamid','vahid','ali','reza'];

            for(var i=0 ; i<arr1.length ; i++){
                document.write(arr1[i]+'<br>');
                if(i==2){ continue; }
            }