rem: table.onmouseover = onTableMouseOver; table.onmouseout = onTableMouseOut; 
add: if (table) { table.onmouseover = onTableMouseOver; table.onmouseout = onTableMouseOut; } 
context: window.onload = function(){   var table = document.getElementById("PopupTable");   table.onmouseover = onTableMouseOver;   table.onmouseout = onTableMouseOut;};
meta: 9563	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9563/39098f111a91162a76fc08b1011b82e1ce7477e6/revisions_popup.js/buggy/trunk/rdiffWeb/static/revisions_popup.js