//<!--
// This function will validate a form
function validate(theform)
{
  pass = 1; //assume everything is ok
  msg = "Please provide a url.";

  //make sure required fields are not empty
  if (theform.url.value == "")
  {
    pass = 0;
  }
  if (pass == 1)
  {
    return true;
  }
  else
  {
    alert(msg);
    return false;
  }
}

function isEmail(string) {
    if (string.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1)
        return true;
    else
        return false;
}

function isAlphaNum(string) {
    if (string.search(/^[A-Za-z0-9]+$/) != -1)
        return true;
    else
        return false;
}

function isNum(string) {
    if (string.search(/^[0-9]+$/) != -1)
        return false;
    else
        return true;
}

function isName(string) {
    if (string.search(/^[A-Za-z-]+\s[A-Za-z-]+$/) != -1)
        return true;
    else
        return false;
}

function valButton(btn) {
var cnt = -1;
for (var i=btn.length-1; i > -1; i--) {
   if (btn[i].checked) {cnt = i; i = -1;}
   }
if (cnt > -1) return btn[cnt].value;
else return null;
}

//-->