html 图片预览上传（支持ie，google，火狐）

 

 

//说明：图片上传预览插件

//上传的时候可以生成固定宽高范围内的等比例缩放图

//参数设置：
//width 存放图片固定大小容器的宽
//height 存放图片固定大小容器的高
//imgShow 页面DIV的JQuery的id
//maxSize 图片大小最大限制(K)
//imgType 数组后缀名
//**********************图片上传预览插件*************************
(function($) {
jQuery.fn.extend({
uploadPreview: function(opts) {
opts = jQuery.extend({
width: 120,
height: 120,
intImg: "1",
imgAll: "#imgAll",
imgShow: "#imgShow",
maxSize:30000,
imgType: ["gif", "jpeg", "jpg", "bmp", "png"],
callback: function() { return false; }
}, opts || {});

//var _self = this;
var _this = $(this);
var imgAll = $(opts.imgAll);
var imgShow = $(opts.imgShow);
imgShow.width(opts.width);
var intImg = opts.intImg;
// imgShow.height(opts.height);

var version = parseInt($.browser.version,10);




//弹出层
var propBox = "

 

";
//弹出层img
var propImg = "

";

autoScaling = function() {

if (version == 7 || version == 8 || version == 9) imgShow.get(0).filters.item("DXImageTransform.Microsoft.AlphaImageLoader").sizingMethod = "image";
var img_width = imgShow.width();
var img_height = imgShow.height();
if (img_width > 0 && img_height > 0) {
var rate = (opts.width / img_width < opts.height / img_height) ? opts.width / img_width : opts.height / img_height;
if (rate <= 1) {
if (version == 7 || version == 8 || version == 9) imgShow.get(0).filters.item("DXImageTransform.Microsoft.AlphaImageLoader").sizingMethod = "scale";
imgShow.width(img_width * rate);
imgShow.height(img_height * rate);
} else {
imgShow.width(img_width);
imgShow.height(img_height);
}
var left = (opts.width - imgShow.width()) * 0.5;
var top = (opts.height - imgShow.height()) * 0.5;
imgShow.css({ "margin-left": left, "margin-top": top });
imgShow.show();
}
},

createImg = function(){
/* imgShow.html('');

var img = $("");
imgShow.replaceWith(img);
imgShow = img; */


if(!$("#img_on_change"+intImg).length>0){

imgShow.before(" ");
//点击删除图片的css
$("#img_on_delete"+intImg).css({
'position': 'absolute',
'background':'#CEDDED',
'z-index':'400',
'right':'2px',
'top':'3px',
'cursor': 'pointer'
});

imgShow.before(" ");
//点击放大图片的css
$("#img_on_change"+intImg).css({
'position': 'absolute',
'background':'#CEDDED',
'z-index':'400',
'right':'20px',
'top':'3px',
'cursor': 'pointer'
});
$('body').append(propBox+propImg);
}
//图片关闭按钮
$('#close_img'+intImg).unbind("click").click(function(){
$('#fade'+intImg).hide();
$('#MyDiv'+intImg).hide();
});

//图片删除按钮
$('#img_on_delete'+intImg).unbind("click").click(function(){
var id = $(this).attr("id");
var num = id.replace("img_on_delete","");
$("#imgAll"+num).remove();
});


//图片放大按钮绑定事件
$('#img_on_change'+intImg).unbind("click").click(function(){

var windowW = $(window).width();
var windowH = $(window).height();
var windowS = document.documentElement.scrollTop + document.body.scrollTop;


$('#fade'+intImg).show(350,function(){
$('#MyDiv'+intImg).show(0,function(){
var i_width = $("#myImg"+intImg).width();
var i_height = $("#myImg"+intImg).height();
$('#MyDiv'+intImg).css({
'top': windowH/2 + windowS - i_height/2 + 'px',
'left': windowW/2 - i_width/2 + 'px',
})
});
});

});

},

_this.change(function() {

if (this.value) {
if (!RegExp("\.(" + opts.imgType.join("|") + ")$", "i").test(this.value.toLowerCase())) {
alert("图片类型必须是" + opts.imgType.join("，") + "中的一种");
this.value = "";
return false;
}
//imgShow.hide();
if ($.browser.msie && version < 10) {

if (version == 6) {

var image = new Image();
image.onload = function(){
if( (image.fileSize/1024) > opts.maxSize) {
alert('图片大小不能超过'+opts.maxSize+'K');
return false;
}
}
image.src = 'file:///' + this.value;

createImg();
imgShow.attr('src', image.src);
$("#myImg"+intImg).attr('src', image.src);
autoScaling();
} else {

this.select();
var img = document.selection.createRange().text;
var image = new Image();
image.onload = function(){
if( (image.fileSize/1024) > opts.maxSize) {
alert('图片大小不能超过'+opts.maxSize+'K');
return false;
}
}
image.src = img;

imgShow.html('');
imgShow.css({ filter: "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=image)" });
imgShow.get(0).filters.item("DXImageTransform.Microsoft.AlphaImageLoader").sizingMethod = "image";


$("#myImg"+intImg).html('');
$("#myImg"+intImg).css({ filter: "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=image)" });
$("#myImg"+intImg).get(0).filters.item("DXImageTransform.Microsoft.AlphaImageLoader").sizingMethod = "image";

try {
imgShow.get(0).filters.item('DXImageTransform.Microsoft.AlphaImageLoader').src = img;
$("#myImg"+intImg).get(0).filters.item('DXImageTransform.Microsoft.AlphaImageLoader').src = img;

} catch (e) {
alert("无效的图片文件！");
return;
}

setTimeout("autoScaling()", 100);
}
}
else {
try{
var file = null;
var size = 0;
if(this.files && this.files[0] ){
file = this.files[0];
size = file.size;
}else if(this.files && this.files.item(0)) {
file = this.files.item(0);
size = file.fileSize;
}

if((size/1024) > opts.maxSize){
alert('图片大小不能超过'+opts.maxSize+'K');
return false;
}

createImg();

//Firefox 因安全性问题已无法直接通过input[file].value 获取完整的文件路径
try{
//Firefox7.0 以下
imgShow.attr('src', file.getAsDataURL());
$("#myImg"+intImg).attr('src', file.getAsDataURL());
}catch(e){
//Firefox8.0以上
imgShow.attr('src', window.URL.createObjectURL(file));
$("#myImg"+intImg).attr('src', window.URL.createObjectURL(file));
}

imgShow.css({ "vertical-align": "middle" });
setTimeout("autoScaling()", 100);
}catch(e){
//支持html5的浏览器,比如高版本的firefox、chrome、ie10
if (this.files && this.files[0]) {
if((this.files[0].size/1024) > opts.maxSize){
alert('图片大小不能超过'+opts.maxSize+'K');
return false;
}

var reader = new FileReader();
reader.onload = function (e) {
imgShow.attr('src', e.target.result);
$("#myImg"+intImg).attr('src', e.target.result);
};
reader.readAsDataURL(this.files[0]);
setTimeout("autoScaling()", 100);
}
};
}
}
});
}
});

})(jQuery);

 

-------------------------------------------------------------------------------------调用方法--------------------------------------------------------------------------------------------

//展示图片
var intImg = 0;
function addImg(){
intImg =intImg+1;

$("#img_td").append(
"

"

+" "
//+"

"
+""
//+"

"
+""
+"

"
);

$("#files"+intImg).unbind("click").on("click",function(){
var id = $(this).attr("id");
var num = id.replace("files","");
$("#files"+num).uploadPreview({ width: 120, height: 120, imgAll: "#imgAll"+num, imgShow: "#imgShow"+num, intImg: num});
}).unbind("change").change(function(){
var id = $(this).attr("id");
var num = id.replace("files","");
if(intImg==num){
addImg();
}
});

$("#imgAll"+intImg).mouseover(function(){
var id = $(this).attr("id");
var num = id.replace("imgAll","");
$("#imgShowi"+num).attr("src","/images/img_addhov.png");
}).mouseout(function(){
var id = $(this).attr("id");
var num = id.replace("imgAll","");
$("#imgShowi"+num).attr("src","/images/img_add.png");
});
}

 

 

 

---------------------------------------------------------------html------------------------------------------------------------------------------------------

 

 

 

---------------------------------------------------------------------------------------------------------------------------------------------------------------

里面还有三张图片自己找找吧网上很多 close.png zoom.png dele.png

 

还有两张鼠标移动图片 不能上传附件就直接贴出来吧 （ 不知道为什么上传不了图片直接把图片名称说出来吧 "/images/img_addhov.png" "/images/img_add.png"）