//Some java script code used to build the calculator

var TxtString;
var TxtNumber = 0;

//from string to number

TxtNumber = number(TxtString);

//from number to string

TxtString = TxtNumber.toString();

//removing last character of a string

TxtString = TxtString.substring(0, TxtString.length - 1);

//removing first character

TxtString = TxtString.substring(1, TxtString.length);

//used escape sequences in the textarea (<br> doesn't work)

\n means New Line
\r means Carriage Return

//replacing \n by <br>
var NewString = OldString.replace (/\n/g, "<br>")