Today, I've found funny resolution to get javascript value from Coldfusion in same page without reloading. I'm not sure whether it might be useful or not, but for me it's kinda useful.
Usage
2 <script>
3 var whatisyourname = "ppshein";
4 document.write(whatisyourname);
5 </script>
6</cfsavecontent>
7
8<cfoutput>#JSvalue#</cfoutput>

Android
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