You need two inputs
Two inputs should get the job done. One input will contain the masked text and the other will be a hidden input that contains the real data.
<input type="text" name="masknumber">
<input type="text" name="number" style="display:none;">
The way I approached the masking is to build a function for both masking and unmasking the content so everything stays uniform.
$("input[name="masknumber"]").on("keyup change", function(){
$("input[name="number"]").val(destroyMask(this.value));
this.value = createMask($("input[name="number"]").val());
})
function createMask(string){
return string.replace(/(\d{2})(\d{3})(\d{2})/,"$1-$2-$3");
}
function destroyMask(string){
return string.replace(/\D/g,'').substring(0,8);
}