Generating specified range does not overlap a random number to produce a specified array does not duplicate the random number

/ * * 
             * Produce a specified range which does not duplicate the random number 
             * a parameters: minimum int 
             * two parameters: the maximum value of int 
             * three parameters: the number of random int 
             * Return Value: Array result the Array 
             * * / 
            function getRandNumForRange (Least , max, NUM) { 
                // check the legality by value 
                iF (NUM> max - Least) return  to false ;
                 // produce a specified range of values all 
                var numlist = [], 
                    numRandList = [], 
                    RANDID; 
                for ( var I = least; i <max; i ++) NumList.push (I);
                 // generating a record number 
                for ( var I = 0 ; I <NUM; I ++ ) { 
                    RANDID = Math.floor (Math.random () * numList.length); // random array of a ID 
                    numRandList.push (numlist [RANDID]); // Get the value 
                    numList.splice (RANDID, . 1 ); // delete the next run again preventing members 
                }
                 return numRandList; 
            } 

            / * * 
             * produce a specified array of non-repeating random number 
             * a parameter: extracting the array array 
             * two parameters: the number of random int
             * Return Value: Array result the Array 
             * * / 
            function getRandNumForArray (numarray, NUM) { 
                // check if valid transmission value 
                IF (NUM> numArray.length) return  to false ;
                 // generates a recording frequency 
                var numRandList = [], 
                    RANDID; 
                for ( var I = 0 ; I <NUM; I ++ ) { 
                    RANDID = Math.floor (Math.random () * numArray.length); // random array of a ID 
                    numRandList.push (numarray [RANDID]); // Get the value 
                    numArray.splice (randId, 1 );// delete this prevents members of the next generation again 
                }
                 return numRandList; 
            }