Problem with pre-populating of cons_email field

Hi Wendy,

Without intervention from a malfunctioning JavaScript, a Convio email address field should never be populated with a referring URL. Could you post the JavaScript that you're using in this thread? Watch out for script tags: this system eats them.

Liz Murphy:

Here is the script without the script tags:

function prepop()

{

var url = '' + this.location;

var idx  = url.indexOf('?');

var query = "&" + url.substring(idx+1);

var qs = query.toLowerCase();

var key = "&cons_email=";

var begin = qs.indexOf(key);

begin += key.length;

var end = qs.indexOf("&", begin);

if (end == -1)

end = query.length;

var emailValue = unescape(query.substring(begin, end));

if(begin == -1)

emailValue = "";

var txtBox = document.getElementById("cons_email");

txtBox.value = emailValue;

}

window.onload = prepop;

Hi Wendy,

Looks like that JavaScript to get the query parameters is failing if those parameters don't exist. You know, if you're building this on a Convio page, you can use a Convio template tag to do this. The S334 tag will render the value of a URL parameter specified in the tag. Put it in code view!

If the current URL is http://you.convio.net/site/PageServer?pagename=register&cons_email=devnull@convio.com

then

]

will render on the page as

devnull@convio.com.

You could put it in a JavaScript:

document.getElementById('cons_email').value = ']';

If this isn't on a Convio page and you don't have access to a server-side scripting language with global variables, you could use this JS function:

function queryParameters(query) {

  var keyValuePairs = query.split(//g);

  var params = {};

  for (var i = 0, n = keyValuePairs.length; i < n; ++i) {

    var m = keyValuePairs.match(/^(+)(?:=(*))?/);

    if (m) {

      var key = decodeURIComponent(m);

      (params || (params = [])).push(decodeURIComponent(m));

    }

  }

  return params;

}

document.getElementById("cons_email").value = queryParameters(document.location.search);

That should be more robust.

Cheers

James