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<script type="text/javascript">
var right_type = new Array(".gif", ".jpg", ".jpeg", ".png", ".bmp")
function checkImgType(fileURL) {
//本程序用来验证后缀,如果还有其它格式,可以添加在right_type;
var right_typeLen = right_type.length;
var imgUrl = fileURL.toLowerCase();
var postfixLen = imgUrl.length;
var len4 = imgUrl.substring(postfixLen - 4, postfixLen);
var len5 = imgUrl.substring(postfixLen - 5, postfixLen);
for (i = 0; i < right_typeLen; i++) {
if ((len4 == right_type[i]) || (len5 == right_type[i])) {
return true;
}
}
}
var tempimg = new Image(); //构建一个image对象,用来临时存取上传的图片信息
function perImg(obj) {//o是浏览上传的值;
var o = obj.value;
var divid = "img_see_" + obj.id.substring(9, obj.id.length);
isOpare = (navigator.userAgent.toLowerCase().indexOf("opera") != -1) ? true : false;
if (isOpare && o.indexOf("http://") == -1) { document.getElementById(divid).innerHTML = "Opera 浏览器得到不本地路径,所以无法提供预览效果,谢谢!"; return; }
if (o != "") {
// o=encodeURIComponent(o);
if (o.indexOf("file:///") == -1 && o.indexOf("http://") == -1) o = "file:///" + o;
//给url加上file,这种方式在非windows平台可能会有问题;
o = o.replace(/\\/g, "/");
tempimg.src = o;
//alert(o+"||"+tempimg.width+"||"+tempimg.height);
//clearTimeout(re);
//re = setTimeout("resize(tempimg,divid);", 100);
resize(tempimg, divid);
}
}
function resize(o, divid) {
//预览时若图片宽或高大于200*200,则设定宽或高最大为200*200;
//上传后再用java/php/c等裁剪生成大小两张图片;
ow = o.width;
oh = o.height;
var ow2 = ow, oh2 = oh; //得到宽高
//alert("ow:"+ow+"oh:"+oh+"\now2:"+ow2+"oh2"+oh2)
try {
if (ow > oh) {//如宽大于高且宽大于200就缩小宽为200,高则按比例缩放
if (ow > 200) { ow2 = 200; oh2 = "auto"; }
} else {//如高大于宽且高大于200就缩小高为200,宽则按比例缩放
if (oh > 200) { oh2 = 200; ow2 = "auto"; }
}
var info = "原宽:" + ow + " || 原高:" + oh + " == " + "改后宽:" + ow2 + " || 改后高:" + oh2;
var getimg = "<a href=\"" + o.src + "\" target=\"_blank\">"
+ "<img border=\"0\" id=\"uploadimg\" src=\"" + o.src + "\" style=\"width:" + ow2 + ";height:" + oh2 + ";\">"
+ "</a>";
document.getElementById(divid).innerHTML = getimg;
} catch (ex) {
alert(ex.toString());
}
}
</script>
<input type='file' id='img_path_{0}' name='img_path_{0}' onchange='{1}' />
<div runat="server" id="AdvContent" width="100%">
</div>