"a" element in JavaScript

I need to have a function that puts the code inside it in an HTML "a" element. I have tried many different variations of the code posted below and none of them have worked.

    var doc = document.body;

    function h1(text) {
        var h1 = document.createElement("h1");
        var t = document.createTextNode(text);
        h1.appendChild(t);
        doc.appendChild(h1);
    }

    function a(a, b) {
        var doc1 = document.createElement("a");
        doc.a;
        var s;
        s = document.createElement('script');
        s.innerHTML = b;
        doc.appendChild(doc1);
        doc = doc1;
        doc1.appendChild(s);
        doc = document.body;
    }

    a("href=www.google.com", "h1(\"hello\");");

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