How to make a page redirect using Javascript? 

Solution 1:

window.location = "http://my.url.here";

Here's some quick-n-dirty code that uses jQuery to do what you want. I highly recommend using jQuery. It'll make things a lot more easier for you, especially since you're new to Javascript.

 id = "pricingOptions" name = "pricingOptions">
  value = "500">Option A
  value = "1000">Option B


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Solution 2:

You can append the values in query string for next page to see and process. You can wrap them inside the link tags:

 href="your_page.php?var1=value1&var2=value2">

You separate each of those values with the & sign.

Or you can create this on button click like this:

="button" onclick="document.location.href = 'your_page.php?var1=value1&var2=value2';">

Solution 3:

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document.location.href="http://yoursite.com"+ document.getElementById('somefield');

That would get the value of some text field or hidden field, and add it to your site url to get a new URL (href). You can modify this to suit your needs.