function replaceChars(entry) {
out = "*"; // replace this
add = "º"; // with this
temp = "" + entry; // temporary holder

while (temp.indexOf(out)>-1) {
pos= temp.indexOf(out);
temp = "" + (temp.substring(0, pos) + add + 
temp.substring((pos + out.length), temp.length));
}
this.Instructions.value = temp;
}