// JavaScript Document
function security_decode (txt) {
	var dtxt=''; var txtc=0; var txtl=txt.length;
	for(var i=0; i<txtl; i+=2) {
		txtc=parseInt(txt.substr(i,2),16);
		dtxt+=String.fromCharCode(txtc);
	}//for
	return dtxt;
}//security_decode

function security_encode (txt) {
	var hstr='0123456789abcdef';
	var etxt=''; var txtc=0; var txtl=txt.length;
	for(var i=0; i<txtl; i++) {
		txtc=txt.charCodeAt(i);
		etxt+=hstr.charAt(Math.floor(txtc/16));
		etxt+=hstr.charAt(txtc%16);
	}//for
	return etxt;
}//security_encode