jquery - JavaScript is it possible to use var in your .html

Is it possible to use var codes in your HTML file but in a .js file you can have the rest of the script?

for example my code is

    
    


    
this
    
    img

but is it possible to do this, if so how do I tell JavaScript to search for the id's between the Body Tags because the script is in the Head Tag and it only searches in the head tag but I don't wont the script in the body tag because it makes it easier to access in the head tag if this is not possible then is it possible to include the var in the html file and the script below the vars in a separate .js file? My example below should explain better.

html file

    


    
this

    
    img

js file

// First Image
    image.src = "your image link for first image here";

    link.title = "Movie title ex Batman (2008)";
    tooltipname.href = "link to site when movie is clicked";
    namebelowimg.innerHTML = "movie name here";
// End First Image

If you need a better example go here

Answer

You getElementById won't work because scripts are executed before body is rendered. Simplest way to make it work is to move script tag after the body.

Other way might be to wait for body to load