Use jquery to achieve equal scaling image effect plug-in_jquery

复制代码 代码如下:

jQuery.fn.autoZoomLoadImage = function(scaling, width, height, loadPic) {
if (loadPic == null) loadPic = "Loading.gif";
return this.each(function() {
var t = $(this);
var src = $(this).attr("src");
var img = new Image();
//alert("Loading")
img.src = src;
//自动缩放图片
var autoScaling = function() {
if (scaling) {
if (img.width > 0 && img.height > 0) {
if (img.width / img.height >= width / height) {
if (img.width > width) {
t.width(width);
t.height((img.height * width) / img.width);
}
else {
t.width(img.width);
t.height(img.height);
}
}
else {
if (img.height > height) {
t.height(height);
t.width((img.width * height) / img.height);
}
else {
t.width(img.width);
t.height(img.height);
}
}
}
}
}
//处理ff下会自动读取缓存图片
if (img.complete) {
//alert("getToCache!");
autoScaling();
return;
}
$(this).attr("src", "");
var loading = $("");
t.hide();
t.after(loading);
$(img).load(function() {
autoScaling();
loading.remove();
t.attr("src", this.src);
t.show();
//alert("finally!")
});
});
}