trHover = function() {
var sfEls = document.getElementById("content").getElementsByTagName("tr");
for (var i=0; i<sfEls.length; i++) {
if( !sfEls[i].className.match('th') ) {
	sfEls[i].onmouseover=function() {
		this.className+=" active";
	}
}
sfEls[i].onmouseout=function() {
	this.className=this.className.replace(new RegExp(" active\\b"), "");
}
}
}
if (window.attachEvent) window.attachEvent("onload", trHover);

trHover = function() {
var sfEls = document.getElementById("laptops").getElementsByTagName("tr");
for (var i=0; i<sfEls.length; i++) {
if( !sfEls[i].className.match('th') ) {
	sfEls[i].onmouseover=function() {
		this.className+=" active";
	}
}
sfEls[i].onmouseout=function() {
	this.className=this.className.replace(new RegExp(" active\\b"), "");
}
}
}
//if (window.attachEvent) window.attachEvent("onload", trHover);