自定义确定弹出框

1.0版本

#
这个方法每次弹出都会创建一个div
需要优化。
#
function alertConfirm(obj){
  var shield = document.createElement("DIV");
  shield.id = "shield";
  shield.style.position = "fixed";
  shield.style.left = "17%";
  shield.style.top = "50%";
  shield.style.width = "66%";
  shield.style.height = "auto";
  shield.style.zIndex = "9999";
  strHtml = "
\n";
  strHtml += " 
[提醒]
\n";
  strHtml += " 
"+obj.str+"
\n";
  strHtml += " 
";
  strHtml += "
\n";
  strHtml += "
\n";
  shield.innerHTML = strHtml;
  document.body.appendChild(shield);
  this.doOk = function(){
    shield.style.display = "none";
    obj.handlerBtn(true);
  }
  this.doCancel = function(){
   shield.style.display = "none";
   obj.handlerBtn(false);
 }
  document.body.onselectstart = function(){return false;};
}

#
调用
#
 alertConfirm({
        str:'是否提现佣金：'+canDrawMoney,
        handlerBtn:function(rt){
          if (rt) {
            alert("11");
          }else{
            alert("22");
          }
        }
 });