let test = document.getElementById("test");
test.addEventListener("mouseover", function( event ) {
alert("mouse over test!")
, false);element.addEventListener('mouseover',someFunction);element.onmouseover = function() {
//Hovering
}<img onmouseover="enlargeImage(this)" border="0" src="smiley.gif" alt="Smiley" width="32" height="32">
<script>
function enlargeImage(x) {
x.style.height = "64px";
x.style.width = "64px";
}
</script>// You can use jQuery
$("p").hover(function(){
$(this).css("background-color", "yellow");
}, function(){
$(this).css("background-color", "pink");
});if(element.style.className.hovered === true) {do something}