1function isBlank(s)
2{
3  if ( (s == null) || (s.length == 0) )
4    return true;
5
6  for(var i = 0; i < s.length; i++)
7  {
8    var c = s.charAt(i);
9	  if ((c != ' ') && (c != '\\n') && (c != '\\t'))
10	    return false;
11  }
12  return true;
13}
14
15function validatecontact(frm) {
16
17  if (isBlank(frm.name.value)) {
18    alert ("Please enter a name");
19    frm.name.focus();
20    return false;
21  }
22  if (isBlank(frm.email.value) || frm.email.value.indexOf("@") == -1) {
23    alert ("Please enter your email address");
24    frm.email.focus();
25    return false;
26  }
27
28  if (isBlank(frm.content.value)) {
29    alert ("Please add a comment");
30    frm.content.focus();
31    return false;
32	}
33}