js动态创建及移除div的方法

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//创建div

function createDiv(){

 if(document.getElementByIdx_x("newD")!=null)

  document.body.removeChild(document.getElementByIdx_x("newD"));

 var Div = document.create_rElement("div");//创建div

 Div.setAttribute("id", "newD");

 Div.style.position = "absolute";

 Div.style.height = "160px";

 Div.style.width = "400px";

 Div.style.border = "1px solid grey";

 Div.style.background = "white";

 Div.style.paddingTop = "40px";

 Div.style.zIndex = "100";

 Div.style.left = 100 +"px";//注意Firefox下必须加"px"

 Div.style.top = 100 +"px";

 Div.style.textAlign = "center";

 Div.style.fontSize = "18px";

 var str = "<div id=\"divClose\" onclick=\"removeDiv()\" style=\"width:16px;height:16px;float:right;margin-top:-40px;background:url(images/divClose.gif);\"><\/div>";

 Div.innerHTML = str + title;

 document.body.appendChild(newD);

}

//移除创建的div

function removeDiv(){

 document.body.removeChild(document.getElementByIdx_x_x("newD"));

}