动态创建DIV：var div = document.createElement("div");
设置div属性及样式等：
div.title="this is a new div.";
div.class = "newDivClass";
div.innerHTML = "Test create a div element!";
div.style.styleFloat="left";
div.style.overflow="hidden";
div.style.marginLeft="8px";
div.style.marginTop="10px";
div.style.width="320px";
div.style.height="250px";
div.style.backgroundRepeat="no-repeat";
div.style.backgroundImage="url(image/bgred.jpg)"
将DIV添加到body：document.body.appendChild(div );
设置Attribute属性：
添加,设置：
(1). div.setAttribute("ok","ok?");
html:
