Question

Two issues I am having.

1. The mouseover function is very FAST and it’s definitely not working properly. I made a separate function for the onmouseout state, but it didnt help.
2. The class changes properly, however it stays changed and doesn’t go back to it’s original class. It depends if the link is on the selected page. Any help would be GREATLY appreciated

JAVASCRIPT:

function changeRollover(rollover) {
    var rollItems = document.getElementById(rollover);
    var rollLinks = rollItems.getElementsByTagName('a');
    var noOfLinks = rollLinks.length;
    for (var r = 0; r < noOfLinks; r++) {
        var normalText = rollLinks[r].innerHTML;
        var rolloverText = rollLinks[r].title;
        var rolloverItem = document.getElementById(rollover);
        rolloverItem.innerHTML = "<a href='#' title='" + normalText + "'>" + rolloverText + "</a>";
        rolloverItem.class = rollover + "rollover";    
    }
}

HTML:

<div class="nav">
    <ul id="NavItems">
        <li id="item0" class="selected"  onClick="changeClass(this.id)" 
                       onmouseover="changeRollover(this.id)">
            <a href="#" title="Shop Trends">Collections</a>
        </li>
        <li id="item1" onClick="changeClass(this.id)" 
                       onmouseover="changeRollover(this.id)">
            <a href="#" title="Shop Everything" >All Jewlery</a>
        </li>
        <li id="item2" onmouseover="changeRollover(this.id)" 
                       onClick="changeClass(this.id)">
            <a href="#" title="Shop Press">As Seen On</a>
        </li>
        <li id="item3" onmouseover="changeRollover(this.id)" 
                       onClick="changeClass(this.id)">
            <a href="#" title="fashion + shop">Collaborations</a>
        </li>
        <li id="item4" onmouseover="changeRollover(this.id)" 
                       onClick="changeClass(this.id)">
            <a href="#" title="Shop Designer">Designer Pop Ups</a>
        </li>
    </ul>
    <div class="shipping">
        <a href="#">start your free orders today<br>
        *** click here for more information ***</a>
    </div>
</div>
<!-- .nav -->

Answer 1

The effect you want (dubious from a usability perspective, but that aside) is better achieved using some simple CSS:

#NavItems .hover {
  display: none;
}
#NavItems:hover .hover {
  display: inline;
}
#NavItems:hover .normal {
  display: none;
}

Which requires markup like this:

<ul id="NavItems">
  <li id="item0">
    <a href="#">
      <span class="normal">Collections</span><span class="hover">Shop Trends</span>
    </a>
  </li>
</ul>