javascript character validation

[mutago]

This script ensures that if the character length is not equal to 6. it will returns error message.

<script type="text/javascript">
function validate(){
    x=document.myForm
    input=x.myInput.value


  //if (input.length != 6 OR 10){


if (input.length != 6){


        alert("The field must contain 6 character or 10 character!")
        return false
    }else {
        return true
    }
}
</script>

Now I want to return error message if character length is not equal to 6 or 10. how do i proceed

Thanks

[Deadweight]

if (input.length >= 6 && input.length<=10){
        return true
    }else {
        alert("The field must contain 6 character or 10 character!")
        return false;
}

Meaning of code:
if the input length is between 6 and 10 both inclusive then do this.
else if it is less than 6 (not including 6) or greater than 10 (not including 10) do this.

Or if you want something like this

if (input.length >= 6 && input.length<=10){
        return true
}else if(input.length < 6){
        alert("The field is too short must contain at least 6 character!")
        return false;
}else{
        alert("The field is too long must contain no more than 10 character!")
        return false;
}