Perhaps you are looking for following code.....
try {
var str="string I need to convert";
//xfa.host.messageBox(""+stringToBytes(str));
var bytArray = stringToBytes(str).split(",");
} catch (e) {
xfa.host.messageBox(""+e)
}
function stringToBytes(str) {
var ch, st, re = [];
for (var i = 0; i < str.length; i++ ) {
ch = str.charCodeAt(i); // get char
st = []; // set up "stack"
do {
st.push( ch & 0xFF ); // push byte to stack
ch = ch >> 8; // shift value down by 1 byte
}
while ( ch );
// add stack contents to result
// done because chars have "wrong" endianness
re = re.concat( st.reverse() );
}
// return an array of bytes
return re;
}
Good Luck,