How to change background color on mouse-over by Javascript

Simple code to change background color and color of your text on mouse-over by Javascript.

You can change any CSS attribute bye this code.

var howervar= document.getElementsByClassName("class-name");
if (howervar!= null) {
if (howervar[0] != null) {
howervar[0].style.backgroundColor = "#365890";
howervar[0].style.color = "#FFFFFF";
}
for (var i = 0; i < tbl.length; i++) { 
howervar[i].onmousemove = function () { this.style.backgroundColor = "#365890"; this.style.color = "#FFFFFF"; };
howervar[i].onmouseout = function () { this.style.backgroundColor = ""; this.style.color = ""; };
}
}