function IsEmpty(s)
{ return ((s == null) || (s.length == 0)) }

function IsWhiteSpace (s)
{
	  var whitespace = " \t\n\r";
      var i;
      if (IsEmpty(s)) return true;

      for (i = 0; i < s.length; i++)
      {
           var c = s.charAt(i);
           if (whitespace.indexOf(c) == -1) return false;
      }
      return true;
 }

function IsPostValid()
{ 
	s = (frmcontact.email.value);
    if (s.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) == -1)
    {
        alert("Please verify email address");
        return false;
    } 
	s = (frmcontact.subjecttext.value);
    if (IsWhiteSpace(s)) 
    {
        alert("Please enter a subject line");
        return false;
    } 
	s = (frmcontact.messagetext.value);
    if (IsWhiteSpace(s)) 
    {
        alert("Please enter a message");
        return false;
    } 
    return true;
}