function fncCheckEmailAddr(strEmailAdr){
	strEmailAdr = strEmailAdr.replace(/^\s* | \s*$/g, ''); //trim white space.
	strEmailAdr = strEmailAdr.toLowerCase();
	return  ( /^\w+([\.\&\'\*\+\-\=\`\~]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,6})+$/.test(strEmailAdr) ? strEmailAdr : '' );
}