2,按给定的宽和高进行固定缩小(会出现图片变形情况)
3,按给定的宽进行等比例缩小
4,按给定的高进行等比例缩小
5,宽和高按百分比缩小
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/htmlcharset=utf-8" />
<title>显示缩略图</title>
</head>
<script type="text/javascript">
//显示缩略图
function DrawImage(ImgD, width_s, height_s) {
/*var width_s=139
var height_s=104
*/
var image = new Image()
image.src = ImgD.src
if (image.width >0 &&image.height >0) {
flag = true
if (image.width / image.height >= width_s / height_s) {
if (image.width >width_s) {
ImgD.width = width_s
ImgD.height = (image.height * width_s) / image.width
} else {
ImgD.width = image.width
ImgD.height = image.height
}
} else {
if (image.height >height_s) {
ImgD.height = height_s
ImgD.width = (image.width * height_s) / image.height
} else {
ImgD.width = image.width
ImgD.height = image.height
}
}
}
/*else{
ImgD.src=""
ImgD.alt=""
}*/
}
</script>
</head>
<body>
<div>
<div>
<div>
<img src="D:\\02.9.3.3\1.jpg" align="center"
onclick="DrawImage(this,200,200)" alt="点击我!">
</div>
</div>
</div>
</body>
</html>