function validate(form)
{
   return chkRequired(form);
}

function chkRequired(form)
{ 
if (isWhitespace(form.Account_Number.value))
{
	alert("Please enter your membership number.");
	form.Account_Number.focus();
	return false;	
}

if (isWhitespace(form.Password.value))
{
	alert("Please enter your password.");
	form.Password.focus();
	return false;	
}
 
return true;
}


var reWhitespace = /^\s+$/


// Check whether string s is empty.

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



// Returns true if string s is empty or 
// whitespace characters only.

function isWhitespace (s)

{   // Is s empty?
    return (isEmpty(s) || reWhitespace.test(s));
}