Html how to pass macro to js?

Question

HTML

It is necessary to substitute links in %link1% via js.
The markup itself:
<a href="%link1%>link</a>

Answer 1

Can

var link1 = "http://yandex.ru";
for(var i=0;i<document.links.length;i++) {
    var a = document.links[i];
    if(a.href == "%link1%") a.href = link1;
}

But this is a bad decision. It's much better to replace links in a server-side language - PHP or Perl