怎么样才能做一个置顶的层？

Question

dialog窗口
showModalDialog("1.htm")

Answer 1

我要这种形式的
<div>
</div>
showModalDialog这个太慢了

Answer 2

/**
* 作用：初始化背景层
  */
alternateWindow.prototype.initBg=function(){
with(this.pBg.style){
position="absolute";
left="0";
top="0";
width="100%";
height="100%";
visibility="hidden";
backgroundColor="#333333";
filter="blendTrans(duration=1) alpha(opacity=30)";
}
this.pBg.filters.blendTrans.apply();
this.pBg.style.visibility="visible";
this.pBg.filters.blendTrans.play();
}
/**
 * 作用：初始化显示层
 */
alternateWindow.prototype.initAlertBody=function(obj,info){
with(obj.style){
position="absolute";
width="400";
height="150";
backgroundColor="#ffffff";
}
obj.style.left=window.document.body.clientWidth/2-200;
obj.style.top=window.document.body.clientHeight/3;
var str;
str ="<table border=0 cellpadding=0 cellspacing=1 bgcolor=#000000 width=100% height=100%><tr height=30>";
str+="<td align=left style='color:#000000;font-size:14px;font-weight:bold' bgcolor=#9999ff>[提示]</td></tr>";
str+="<tr><td align=center bgcolor=#efefff style='font-size:12px;color:#000000;vertical-align: middle;'>";
str+=info+"</td></tr><tr height=30 bgcolor=#efefef><td align=center>" +
     "<input type='button' value='确定' id='OK'" +
     " onkeydown='parent.alternateWin.onKeyDown(event,this)'"+
     " onclick='parent.alternateWin.closeWin()' style='border:solid 1px #666666;background:#cccccc'>" +
     "</td></tr></table>";
obj.innerHTML=str;
this.win.document.body.all.OK.focus();
this.FocusWhere="OK";
}alternateWindow.prototype.onKeyDown=function(event,obj){
  switch(event.keyCode){
  case 9:
   event.keyCode=-1;
  if(this.type=="confirm"){
  if(this.FocusWhere=="OK"){
  this.win.document.body.all.NO.focus();
  this.FocusWhere="NO";
  }else{
  this.win.document.body.all.OK.focus();
  this.FocusWhere="OK";
  }
  }
  break;
  case 13:obj.click();;break;
  case 27:this.closeWin();break;  
  }  }
/**
 * 作用：初始化显示层 conFirm提示层
 */
alternateWindow.prototype.initConfirmBody=function(obj,info,ok_func,notok_func,ok_str,notok_str){
with(obj.style){
position="absolute";
width="400";
height="150";
backgroundColor="#ffffff";
}
if(ok_str==null){
ok_str="确定";
}
if(notok_str==null){
notok_str="取消"
}
obj.style.left=window.document.body.clientWidth/2-200;
obj.style.top=window.document.body.clientHeight/3;
var str;
str="<table border=0 cellpadding=0 cellspacing=1 bgcolor=#000000 width=100% height=100%><tr height=30>";
str+="<td align=left style='color:#000000;font-size:14px;font-weight:bold' bgcolor=#9999ff>[询问]</td></tr>";
str+="<tr><td align=center bgcolor=#efefff style='font-size:12px;color:#000000;vertical-align: middle;'>";
str+=info+"</td></tr><tr height=30 bgcolor=#efefef><td align=center>" +
"<input type='button' id='OK'" +
" onkeydown='parent.alternateWin.onKeyDown(event,this)'"+
" onclick='parent.alternateWin.closeWin();parent."+ok_func+"();' " +
" value='"+ok_str+"' style='border:solid 1px #666666;background:#cccccc'>"+
"&nbsp;&nbsp;&nbsp;<input type='button' value='"+notok_str+"' id='NO'"+
" onkeydown='parent.alternateWin.onKeyDown(event,this)'"+
" onclick='parent.alternateWin.closeWin();" +
" parent."+notok_func+"();' style='border:solid 1px #666666;background:#cccccc'></td></tr></table>";
obj.innerHTML=str;
this.win.document.body.all.OK.focus();
}/**
 * 作用：关闭一切
 */
alternateWindow.prototype.closeWin=function(){
alternateFrame.style.visibility="hidden"; 
this.showAllSelect();
document.body.style.overflow="auto"; 
}
/**
  * 作用:隐藏所有的select
  */
alternateWindow.prototype.hideAllSelect=function(){
  var obj;
  obj=document.getElementsByTagName("SELECT");
  var i;
  for(i=0;i<obj.length;i++)
obj[i].style.visibility="hidden";
  }
/**
 * 显示所有的select
 */  
  alternateWindow.prototype.showAllSelect=function(){
  var obj;
  obj=document.getElementsByTagName("SELECT");
  var i;
  for(i=0;i<obj.length;i++)
obj[i].style.visibility="visible";
}
</script><!---------------------------------------------------------------->
<script>
function clk_yes(){
alert("你也同意了我的观点");
}
function clk_no(){
alert("不是你眼花了就是我眼花了！");
}
</script>