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一个div两张图片,根据鼠标位置改变background jQuery(function(){
// Loop through all the sets of before and after pics
jQuery(".beforeafter").each(function(){
// Set the container's size to the size of the image
jQuery(this).width(jQuery(this).find("img[rel=before]").attr("width")).height(jQuery(this).find("img[rel=before]").attr("height"));
// Convert the images into background images on layered divs
jQuery(this).append("<div class='after'></div>").find(".after").css({"background": "url(" + jQuery(this).find("img[rel=after]").attr("src") + ")", "width": jQuery(this).find("img[rel=after]").attr("width") + "px", "height": jQuery(this).find("img[rel=after]").attr("height") + "px"});
jQuery(this).append("<div class='before'></div>").find(".before").css({"background": "url(" + jQuery(this).find("img[rel=before]").attr("src") + ")", "width": jQuery(this).find("img[rel=before]").attr("width") - 40 + "px", "height": jQuery(this).find("img[rel=before]").attr("height") + "px"});
// Add a helpful message
jQuery(this).append("<div class='help'>鼠标悬停图片上滑动观看</div>");
// Remove the original images
jQuery(this).find("img").remove();
// Event handler for the mouse moving over the image
jQuery(this).mousemove(function(event){
// Need to know the X position of the parent as people may have their browsers set to any width
var offset = jQuery(this).offset().left;
// Don't let the reveal go any further than 50 pixels less than the width of the image
// or 50 pixels on the left hand side
if ((event.clientX - offset) < (jQuery(this).find(".after").width() -50) && (event.clientX - offset) > 50) {
// Adjust the width of the top image to match the cursor position
jQuery(this).find(".before").width(event.clientX - offset);
}
});
// Fade out the help message after the first hover
jQuery(this).hover(function(){
jQuery(this).find(".help").animate({"opacity": 0}, 400, function(){ jQuery(this).find(".help").remove(); });
});
});
});
<script type="text/javascript">
<!--
jQuery(function(){
// Loop through all the sets of before and after pics
jQuery(".beforeafter").each(function(){
// Set the container's size to the size of the image
jQuery(this).width(jQuery(this).find("img[rel=before]").attr("width")).height(jQuery(this).find("img[rel=before]").attr("height"));
// Convert the images into background images on layered divs
jQuery(this).append("<div class='after'></div>").find(".after").css({"background": "url(" + jQuery(this).find("img[rel=after]").attr("src") + ")", "width": jQuery(this).find("img[rel=after]").attr("width") + "px", "height": jQuery(this).find("img[rel=after]").attr("height") + "px"});
jQuery(this).append("<div class='before'></div>").find(".before").css({"background": "url(" + jQuery(this).find("img[rel=before]").attr("src") + ")", "width": jQuery(this).find("img[rel=before]").attr("width") - 40 + "px", "height": jQuery(this).find("img[rel=before]").attr("height") + "px"});
// Add a helpful message
jQuery(this).append("<div class='help'>鼠标悬停图片上滑动观看</div>");
// Remove the original images
jQuery(this).find("img").remove();
// Event handler for the mouse moving over the image
jQuery(this).mousemove(function(event){
// Need to know the X position of the parent as people may have their browsers set to any width
var offset = jQuery(this).offset().left;
// Don't let the reveal go any further than 50 pixels less than the width of the image
// or 50 pixels on the left hand side
if ((event.clientX - offset) < (jQuery(this).find(".after").width() -50) && (event.clientX - offset) > 50) {
// Adjust the width of the top image to match the cursor position
jQuery(this).find(".before").width(event.clientX - offset);
}
});
// Fade out the help message after the first hover
jQuery(this).hover(function(){
jQuery(this).find(".help").animate({"opacity": 0}, 400, function(){ jQuery(this).find(".help").remove(); });
});
});
});
//-->
</script>
<style type="text/css" media="screen">
#beforeafter .section {
margin-top: 2em;
position: relative;
}
#beforeafter .section p.source {
position: absolute;
right: 0;
top: 0;
color: #999;
font-size: 12px;
}
.beforeafter { position: relative; overflow: hidden; }
.before, .after { position: absolute; top: 0; left: 0; }
.before {
border-right: 5px solid #000;
-moz-box-shadow: 1px 0 20px #222;
-webkit-box-shadow: 1px 0 20px #222;
box-shadow: 1px 0 20px #222;
}
.help {
position: absolute;
bottom: 20px;
right: 70px;
font: bold 20px/1em Helvetica, Arial, sans-serif;
color: #FFF;
opacity: 0.7;
}
h2 {
font-size:18px; font-weight:bold; text-align:left; line-height:31px;
}
</style>
</head> <body>
<div id="beforeafter" style=""><div class="section">
<h2>仙台机场 [鼠标移动图片上滑动观看]</h2>
<p class="source">数据来源:澳大利亚广播公司</p>
<div class="beforeafter">
<img src="http://img1.cache.netease.com/cnews/zyguan/riben/1.jpg" rel="before" alt="Sendai Airport (before disaster)" width="940" height="529" />
<img src="http://img1.cache.netease.com/cnews/zyguan/riben/2.jpg" rel="after" alt="Sendai Airport (after disaster)" width="940" height="529" />
</div>
</div>
<div class="section">
<h2>仙台市荒滨</h2>
<p class="source">图片数据来源 ABC news</p>
<div class="beforeafter">
<img src="http://img1.cache.netease.com/cnews/zyguan/riben/3.jpg" rel="before" alt="Arahama in Sendai (before disaster)" width="940" height="529" />
<img src="http://img1.cache.netease.com/cnews/zyguan/riben/4.jpg" rel="after" alt="Arahama in Sendai (after disaster)" width="940" height="529" />
</div>
</div></div>
</body>