element.addEventListener('mouseover',someFunction);
<div id="mydiv">foo</div>
<script>
document.getElementById("mydiv").onmouseover = function()
{
this.style.backgroundColor = "blue";
}
</script>
element.onmouseover = function() {
//Hovering
}
// Creamos el evento mouseover para cada imagen
imagenes[i].addEventListener("mouseover", function(e){
document.getElementById("mostrar").style.backgroundImage="url('"+e.target.currentSrc+"')";
});
// Creamos el evento mouseout para cada imagen
imagenes[i].addEventListener("mouseout", function(e){
document.getElementById("mostrar").style.backgroundImage="";
});
// 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}