Set and clear html5 persistent data

Im working on using HTML5 persistent storage on an existing application used for the purpose of surveys.

What I need to now do, is pass a variable through to the final "completed" page, which I can then use to remove the persistant object that I have saved in the mobile devices memory.

Any ideas how I can do this?

Currently, the submit button is set up like this.

<input type='开发者_开发技巧submit' value='Submit' onclick="saveData(); surveyfunction();"/>

The saveData() function, is my function, (adds values to array then makes a unique object e.t.c, the surveyfunction is the survey softwares function for physically submitting the data.

Any ideas greatly appreciated - thanks!

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Use localStorage.get/setItem. This worked when I tested it locally:

(test.html)

<script type="text/javascript">
localStorage.setItem('HelloWorld', 'Buongiorno, mundo!');
alert(localStorage.getItem('HelloWorld'));
window.location.href='test2.html';
</script>

(test2.html)

<script>
alert(localStorage.getItem('HelloWorld'));

</script>

You'll want to test for local storage support using Modernizr or something.

UPDATE:

what I need to do, is find somehow to call the saved object with a set key (the variable I will pass), dynamically from the success page, so that I know its ok to delete the item from the memory...

You can either persist it to a cookie or local storage. Local storage is probably preferable, but there's no reason you can't come up with a very detailed naming convention for it.

On the completed page, there is no way to obtain the SID of the completed survey.

Why can't you set the SID in a cookie? With cookies, you can set the path that the cookie is visible to as part of the cookie's configuration. That means if you have /survey1 and /servey2 on your server, you can set two separate cookies each with their own SID value.