function validEmailAddress(emailStr)
{
	
	//  check for valid email address
	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 > 7)
  {		
		return false;
	}

	if (len<2)
	{			 
		return false;
	}
	
	return true;
}




function isNumeric(strString)
//  check for valid numeric strings	
{
   var strValidChars = "0123456789.-";
   var strChar;
   var blnResult = true;

	for (i = 0; i < strString.length && blnResult == true; i++)
	{
		strChar = strString.charAt(i);
		if (strValidChars.indexOf(strChar) == -1)
		{
			blnResult = false;
		}
	}
	
	return blnResult;
}