function openWindow(x){
    window.open(x,"","scrollbars=yes,resizable=yes,width=750,height=350,top=100,left=100,location=yes,menubar=yes,status=yes,toolbar=yes")
}

function openPopup(x){
    window.open(x,"","scrollbars=yes,resizable=yes,width=400,height=350,top=100,left=100")
}

function isEmail (s)
{   if (isEmpty(s))
       if (isEmail.arguments.length == 1) return false;
       else return (isEmail.arguments[1] == true);

    // is s whitespace?
    if (isWhitespace(s)) return false;

    // there must be >= 1 character before @, so we
    // start looking at character position 1
    // (i.e. second character)
    var i = 1;
    var sLength = s.length;

    // look for @
    while ((i < sLength) && (s.charAt(i) != "@"))
    { i++
    }

    if ((i >= sLength) || (s.charAt(i) != "@")) return false;
    else i += 2;

    // look for .
    while ((i < sLength) && (s.charAt(i) != "."))
    { i++
    }

    // there must be at least one character after the .
    if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
    else return true;
}

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

function isWhitespace (s){   
	var whitespace = " \t\n\r";
	var i;

    // Is s empty?
    if (isEmpty(s)) return true;

    // Search through string's characters one by one
    // until we find a non-whitespace character.
    // When we do, return false; if we don't, return true.

    for (i = 0; i < s.length; i++)
    {
        // Check that current character isn't whitespace.
        var c = s.charAt(i);

        if (whitespace.indexOf(c) == -1) return false;
    }

    // All characters are whitespace.
    return true;
}