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var nodes = document.getElementById("nav").getElementsByTagName("LI"); 

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nodes[i].onmouseover = function() { 

this.className += " over"; 

} 

nodes[i].onmouseout = function() { 

this.className = this.className.replace(new RegExp(" over\\b"), ""); 

} 

} 

} 

if (window.attachEvent) window.attachEvent("onload", startList);