dumb tpl expansions

tpl.js

var fetchFnComment = function(f) {
    return f.toString()
        .replace(/^[^\/]+\/\*!?/, '')
        .replace(/\*\/[^\/]+$/,   '');
};

var applyTemplate = function(targetEl, tpl, model) {
    tpl = fetchFnComment(tpl);
    for (var k in model) {
        tpl = tpl.replace( new RegExp('({{'+k+'}})', 'g'), model[k] );
    }
    targetEl.innerHTML = tpl;
};

var tpl1 = function() {/*
<b>Hello {{name}}!</b><br/>
My name is {{name}} and I'm {{age}}.
*/};
applyTemplate(ctn, tpl1, {name:'Johnny', age:20});