/**
*/
function LTrim(str){
	var i;
	for(i=0;i<str.length;i++){
	 if(str.charAt(i)!=" "&&str.charAt(i)!="กก") 
	 		break;
	}
	str = str.substring(i,str.length);
	return str;
}

function RTrim(str){
	var i;
	for(i=str.length-1;i>=0;i--){
		if(str.charAt(i)!=" "&&str.charAt(i)!="กก") 
			break;
	}
	str = str.substring(0,i+1);
	return str;
}

function Trim(str){
	return LTrim(RTrim(str));
}

function checkEmails(email){
	return  /^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/.test(email);
}

/**
todel
*/
function checkEmailsBak(emailStr) {
      if (emailStr.length == 0) {
          return false;
      }
      var emailPat=/^(.+)@(.+)$/;
      var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]";
      var validChars="\[^\\s" + specialChars + "\]";
      var quotedUser="(\"[^\"]*\")";
      var ipDomainPat=/^(\d{1,3})[.](\d{1,3})[.](\d{1,3})[.](\d{1,3})$/;
      var atom=validChars + '+';
      var word="(" + atom + "|" + quotedUser + ")";
      var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
      var domainPat=new RegExp("^" + atom + "(\\." + atom + ")*$");
      var matchArray=emailStr.match(emailPat);
      if (matchArray == null) {
          return false;
      }
      var user=matchArray[1];
      var domain=matchArray[2];
      if (user.match(userPat) == null) {
          return false;
      }
      var IPArray = domain.match(ipDomainPat);
      if (IPArray != null) {
          for (var i = 1; i <= 4; i++) {
             if (IPArray[i] > 255) {
                return false;
             }
          }
          return true;
      }
      var domainArray=domain.match(domainPat);
      if (domainArray == null) {
          return false;
      }
      var atomPat=new RegExp(atom,"g");
      var domArr=domain.match(atomPat);
      var len=domArr.length;
      if ((domArr[domArr.length-1].length < 2) ||
          (domArr[domArr.length-1].length > 3 && domArr[domArr.length-1].indexOf("disabled")<0)) {
          return false;
      }
      if (len < 2) {
          return false;
      }
      return true;
   }

   
	function checkByteLength(str,minlen,maxlen) {
		if (str == null) return false;
		var l = str.length;
		var blen = 0;
		for(i=0; i<l; i++) {
			if ((str.charCodeAt(i) & 0xff00) != 0) {
				blen ++;
			}
			blen ++;
		}
		if (blen > maxlen || blen < minlen) {
			return false;
		}
		return true;
	}