I presently have css and javascript file calls (among other activities) such as the following:

href="/css/default.css" src="/js/ui_control.js"

putting the preceding / directly into result in the files in accordance with the main.

This is effective when my page is incorporated in the cause of the domain. However, I am presently in the center of moving my website to a different host company and therefore possess a temporary URL that is: HOST-IP/~username

As a result, all file calls are attempting to be known as from HOST-IP/css/default.css etc rather than inside the ~username sub-folder.

Obviously I'm able to hold back until the domain title servers propagate but that is near the point.

Wouldso would Time passes about writing a guide within the .htaccess file that will redirect all file calls that begin with a /, from likely to HOST-IP/FILE-CALL, and rather to visit HOST-IP/~USERNAME/FILE-CALL. ?

Any ideas?

I'd suggest altering the references inside your HTML towards the files to become relative, as this works in both a sub folder or because the cause of the domain.

This is effective when my page is incorporated in the cause of the domain. However, I am presently in the center of moving my website to a different host company and therefore possess a temporary URL that is: HOST-IP/~username

Wouldso would Time passes about writing a guide within the .htaccess file that will redirect all file calls that begin with a /, from likely to HOST-IP/FILE-CALL, and rather to visit HOST-IP/~USERNAME/FILE-CALL. ?

Unless of course place the a .htaccess at HOST-IP/.htaccess around the new server, you cannot do that with .htaccess. It may sound like you are on the shared host, so any approach that'd allow you to do that with .htaccess would permit you to hijack everybody else's site around the server.