I'm making simple site for my school project. My code doesn't work on my teacher's PC (he has IE 6 or 7 - I don't remember).

I use it to change content on site (kind of menu).

html:

<ul>
    <li onclick="run(1)"> ...  </li>
    <li onclick="run(2)"> ...  </li>
    <li onclick="run(3)"> ...  </li>
    <li onclick="run(4)"> .... </li>
    <li onclick="run(5)"> .... </li>
    <li onclick="run(6)"> .... </li>
</ul>

Script:

function run(x) {
    ///New Content:

    var a =

    ...

    var e = "<a href='xxxx'> aaaaaa</a>" //example

    /////////////////////

    var p = document.getElementById("content");

    if(x === 1) {
        p.innerHTML=a;
    }
    else if(x === 2) {
        p.innerHTML=b;
    }
    else if(x === 3) {
        p.innerHTML=c;
    }
    else if(x === 4) {
        p.innerHTML=d;
    }
    else if(x === 5) {
        p.innerHTML=e;
    }
    else {
        p.innerHTML=f;
    }  
};