Simple TR Background Change

I'm currently using this script to highlight the text within a whole row of a table on mouseOver.

What I'd like to do is change it so that the background color changes. I've tried 'this.style.backgroundcolor = "#e00000" ' but with no success.


function highlightRows() {
if (!document.getElementsByTagName) return false;
var rows = document.getElementsByTagName("tr");
for (var i=0; i<rows.length; i++) {
rows[i].onmouseover = function() {
this.style.color = "#e00000";
}
rows[i].onmouseout = function() {
this.style.color = "#000000";
}
}
}
addLoadEvent(highlightRows);