我有一些非常简单的js代码(我还在学习),基本上它会读取表单的元素并创建一个url字符串,然后将其传递给图像服务器,该服务器随后呈现出图像。
var imgURL = "site.com/path/to/image";
var product = "BirthdayCard_End" + "?&";
var page = 2;
var format;
var data;
function setPage(inputID)
{
page = inputID;
setJPG();
}
function FormValues()
{
var str = '';
var elem = document.getElementById('form1').elements;
for(var i = 0; i < elem.length; i++)
{
str += "$" + elem[i].id + "=" + elem[i].value + "&";
}
data = str;
}
function genPDF()
{
var format = "fmt=pdf&mediaMargin=48&bleedMargin=48&printerMark=1,1,1,1,1,Illustrator,.25,1";
fullURL = imgURL + product + data + format;
window.open(fullURL);
}
function setJPG()
{
FormValues();
var format = "imageRes=200&fmt=jpg&wid=550&page=" + page;
fullURL = imgURL + product + data + format;
document.getElementById('lblValues').innerHTML = fullURL;
document.getElementById('image').src = fullURL;
}
我正在尝试找出如何显示一个简单的加载器,就像这个 (http://fgnass.github.com/spin.js/#v1.2.5)。我该如何向setJPG()函数添加内容,以便每次初始化时都会弹出加载器,然后在图片加载完成后淡出?