Change Color of Element onMouseOver Using Javascript
I'm Writing Javascript Which Will Change the Color of an Element When the Mouse Hovers over It. I Know Perfectly How to Do This Using jQuery, but This Time...
I'm writing javascript which will change the color of an element when the mouse hovers over it. I know perfectly how to do this using jQuery, but this time around I have to do it using either pure JS or Prototype.
Why doesn't this work:
<div id="boundary1"></div>
document.getElementById("boundary1").onmouseover(function() {
alert("test");
})
firebug returns:
TypeError: document.getElementById(...).onmouseover is not a function
5 Answers
Your syntax is wrong, you may be thinking a little too 'jQuery', try this:
var boundary = document.getElementById('boundary');
var mouseOverFunction = function () {
// this.style.color = '#000'; // your colour change
};
boundary.onmouseover = mouseOverFunction;
I've separated the logic to make the development and logic clearer, it makes your functions reusable too.
The Prototype way to do this would be this:
$('elementId').observe('mouseenter', function(evt){
this.setStyle('background-color: yellow');
}).observe('mouseleave', function(evt){
this.setStyle('background-color: inherit');
});
But as others have already pointed out, the real way to do this is with CSS. The only reason I could imagine needing to do it in JS is if you have to support IE <= 8, which doesn't like to do the :hover pseudo-class on anything except the A tag.
Try this code
<td onMouseOver="this.bgColor='#00CC00'" onMouseOut="this.bgColor='#009900'" bgColor=#009900>
<A HREF="#">Click Here</A></TD>
You can do it using CSS
<style>
.changecolour:hover
{
background-color:yellow;
}
</style>
Now for the text you want to change color
<span class ="changecolour">Color changes when mouse comes here.</span>
Reference :
Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.
