<html>
<body>
<script type="text/javascript">
function Saveit(){
temp.document.execCommand("saveas")
}
</script>
<iframe id="temp" style="display:none"></iframe>
<img src="ddd.jpg" onClick="Saveit()">
<script>
temp.location="ddd.jpg" //在隐藏帧中加载图片</script>
</body>
</html>
