var select = document.createElement("select");
elect.options[0] = new Option("加载项1", "value1");
select.options[1] = new Option("加载项2", "value2");
select.size = "2";
testDiv.appendChild(select);

var openDiv = document.createElement("div");
openDiv.id = "div3D";
openDiv.style.width = w+"px";
openDiv.style.height = h+"px";
openDiv.innerHTML = strHtml;
document.body.appendChild(openDiv);

function CreateDom() {
   var select = $("<select/>").appendTo($("body"));
   var option1 = $("<option value=\"1\">text1</option>").appendTo(select);
   var option2 = $("<option value=\"2\">text2</option>").appendTo(select);
   var option3 = $("<option value=\"3\">text3</option>").appendTo(select);
   var text = $("<input type=\"text\">").css({ "width": "150px", "border": "1px lightgrey solid" }).appendTo($("body"));
   var checkbox = $("<input type=\"checkbox\" />").appendTo($("body"));
   var ul = $("<ul/>").appendTo($("body"));
   var li = $("<li>li1</li>").appendTo(ul);
   var li = $("<li>li2</li>").appendTo(ul);
}