function lcm_more_than_two_numbers(input_array) {  
        if (toString.call(input_array) !== "[object Array]")    
            return  false;    
     var r1 = 0, r2 = 0;  
        var l = input_array.length;  
        for(i=0;i<l;i++) {  
            r1 = input_array[i] % input_array[i + 1];  
            if(r1 === 0) {  
                input_array[i + 1] = (input_array[i] * input_array[i+1]) / input_array[i + 1];  
            }  
            else {  
                r2 = input_array[i + 1] % r1;  
                if(r2 === 0) {  
                    input_array[i + 1] = (input_array[i] * input_array[i + 1]) / r1;  
                }  
                else {  
                    input_array[i+1] = (input_array[i] * input_array[i + 1]) / r2;  
                }  
            }  
        }  
        return input_array[l - 1];  
    }  
      
    console.log(lcm_more_than_two_numbers([100,90,80,7]));   
    console.log(lcm_more_than_two_numbers([5,10,15,25]));