function IsEmail(emailStr) {
  if (  emailStr.match( new RegExp(
                        '^(\\s*)(("[^"]*")|\\w+([*&+~!-\\.]\\w+)*)
                         @\\w+([-\\.]\\w+)*\\.\\w{1,3}(\\s*)$'
                                   ) ) == null )
	return false;
  return true;
}

function IsNumber(sText)
{
   var ValidChars = "0123456789";
   var IsNumber=true;
   var Char;

   for (i = 0; i < sText.length && IsNumber == true; i++) { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) {
         IsNumber = false;
      }
   }
   return IsNumber;
}

function GetUrlParameter(param) {
 var val = "";
 var qs = window.location.search;
 var start = qs.indexOf(param);

 if (start != -1) {
  start += param.length + 1;
  var end = qs.indexOf("&", start);
  if (end == -1) {
   end = qs.length
  }
  val = qs.substring(start,end);
 }
 return val;
}