JavasScript variable to Coldfusion

I need to pass the screen height and width to coldfusion variables, so I can output the value in a link.

e.g.

<a href="http://mysite/myfolder/?keepThis=true&amp;TB_iframe=true&amp;height=<cfoutput>#height#</cfoutput>&amp;width=<cfoutput>#width#</cfoutput>" class="smoothbox" title="mypage">mypage</a>

Code (markup):

My problem is how can I get javascript screen.height stored as the coldfusion variable #height# ?

Thanks in advance for your advice.

 

Javascript runs _after_ all ColdFusion code is already finished. So you cannot do this on the same page/request. You need to use separate pages (or ajax).

The first page would grab the screen height using javascript, and pass that value to the second page, in either a form field or as a url variable.

Page 1:
<script>
...
document.href = "http://yoursite.com/page2.cfm?height"+ jsHeightVariable;
</script>

Then the second page will have access to #height# as a either a URL or FORM variable, depending on which method you used on page 1:

Page 2:
#url.height# ... or
#form.height#

 

The only problem with doing what cfstarlight says is that if your index page is just a script that get the screen size and pushes it to another page your SEO is going to go way down. Search engines do not like re-routing like that on the Home Page.

 

Who asked about SEO? The question was about javascript and the answer is correct. It cannot be done in a single request.