pr_1 = "mai";
pr_2 = "lto:";
ktos = "info";
gdzie1 = "victoriagab";
gdzie2="riela.pl";
document.write('<a href=\"'+pr_1+pr_2+ktos+String.fromCharCode(64));
document.write(gdzie1+gdzie2+'\">'); 
document.write(ktos+String.fromCharCode(64)+gdzie1+gdzie2+'<\/a>');