function validateEmail(sEmail)
{ 
	var reEmail=/^(.+)@(.+)$/; 
	var reQuotedString="(\"[^\"]*\")";
	var reIPDomain=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
	var reValidCharString="\[^\\s\\(\\)><@,;:\\\\\\\"\\.\\[\\]\]+";
	var reGetString="(" + reValidCharString + "|" + reQuotedString + ")";
	var reUserName=new RegExp("^" + reGetString + "(\\." + reGetString + ")*$");
	var reDomain=new RegExp("^" + reValidCharString + "(\\." + reValidCharString +")*$");
	var reWholeCharString=new RegExp("^" + reValidCharString + "$");
	
	var matchArray=sEmail.match(reEmail);
	if (matchArray==null) return false; 
	var sUsername=matchArray[1];
	var sDomain=matchArray[2];
	
	for (i=0; i<sUsername.length; i++) {
	    if (sUsername.charCodeAt(i)>127) return false; 
	} 
	if (sUsername.match(reUserName)==null) return false;
	
	for (i=0; i<sDomain.length; i++) {
	    if (sDomain.charCodeAt(i)>127) return false;
	} 
	
	var arrIPNums=sDomain.match(reIPDomain);
	if (arrIPNums!=null)
	{
	    for (var i=1;i<=4;i++) { 
	        if (arrIPNums>255) return false; 
	    }    
	} 
	else
	{
	    var arrDomains=sDomain.split(".");
	    var iDomainLen=arrDomains.length;
	    if (iDomainLen<2) return false; 
	    for (i=0;i<iDomainLen;i++) { 
	        if (arrDomains[i].search(reWholeCharString)==-1) return false; 
	    } 
	}
	return true;
}