CGI Voting Perl Script

Hello, I am using a .cgi perlscript voting form which was primarily designed years back for IE browsers. My problem is I need the code updated/upgraded so it will support Chrome, Firefox, and maybe even Safari browsers. I have attached a screenshot of all 3 browsers: Chrome, Firefox, and then Internet Explorer (correct). Notice the image replacement checkbox and radio button icons. I need Chrome, Firefox, and possibly even Safari browsers to recognize the image replacement. I can provide HTML, images, and scripting. Please help.