JavaScript 进度条实现代码(Firefox等相似浏览器下不支持)

[code]
<script type="text/javascript">
var loading = {
element: null,
count: 0,
ID: 0,
createLoading: function(parent, width, height){ //用于生成外围的进度条框
loading.element = document.createElement("div");
loading.element.id = "loading";
loading.element.className = "loading";
loading.element.style.height = height;
loading.element.style.backgroundColor = "#ffffff";
loading.element.style.border = "1px solid #333333";
loading.element.style.width = width;
parent.appendChild(loading.element);
loading.interval();
},
addSubDIV: function(){ //用setInterval添加外围框内的div标签实现进度效果
//如果达到外围框的宽度，则重新显示进度
if ((loading.count + 1) * 2 >= parseInt(loading.element.style.width)) {
loading.count = 0;
clearInterval(loading.ID);
loading.element.innerHTML = "";
loading.interval();
}
else {
var elem = document.createElement("div");
elem.className= sub-loading ;
elem.style.backgroundColor = "#f00";
elem.style.width = "2px";
elem.style.height = loading.element.style.height;
elem.style.display="inline";
loading.element.appendChild(elem);
loading.count++;
}
},
interval: function(){ //反复调用
loading.ID = setInterval(loading.addSubDIV, 30);
}
}
onload = function(){
loading.createLoading(document.getElementById("parent"), "402px", "15px");
}
</script>