JS创建htmL元素

var newBgDiv = document.createElement("div"); newBgDiv.id = bgid; newBgDiv.style.position = "absolute"; newBgDiv.style.zIndex = "9998"; newBgDiv.style.left=0; newBgDiv.style.top=0; newBgDiv.style.width = width; newBgDiv.style.height = height; newBgDiv.style.backgroundColor = "#ccc"; newBgDiv.style.filter = "alpha(opacity=50)"; newBgDiv.style.mozopacity = "0.5"; document.body.appendChild(newBgDiv);