var wildCount = inputSt.match(/%/g)  //works out how many % are there
var newPlaceholder =''
for (var i = 0; i < wildCount.length; i++){
    newPlaceHolder =inputSt.split("%").join(i)
    for (var n = 0; n <=254; n++){
        newPlaceholder = inputSt.split("%").join(n)
     }
 }