Поправил =>
http://hostjs-mybb2011.narod.ru/Andrey1205.htm
<html>
<head>
<style type="text/css">
body {
background-color:#fff;
}
.img {
height: 100px;
width: 100px;
margin: 7px;
}
.div1{
background-color:red;
width:114px;
position: relative;
z-index: 1;
}
.div2{
background-color:blue;
position: absolute;
top: 20px;
height: 100px;
width: 100px;
z-index: 3;
}
</style>
</head>
<body>
<div class="div2" onmouseover="this.style.cursor='pointer';" onclick="alert('onClickEvent');"></div>
<div class="div1">
<img class="img" src="http://uploads.ru/i/W/t/y/Wty78.gif">
</div>
</body>
</html>