how does the css “onmouseover” event work?
问题 update- sorry folks, i should have provided the link to the website where i saw the effect. here you go - http://www.w3schools.com/Css/css_image_transparency.asp and the code that i saw there (and the basis of this question) is as below - <img src="klematis.jpg" style="opacity:0.4;filter:alpha(opacity=40)" onmouseover="this.style.opacity=1;this.filters.alpha.opacity=100" onmouseout="this.style.opacity=0.4;this.filters.alpha.opacity=40" /> The original question is as below - I was looking for