Question

我正在尝试创建一个类似于在SO上单击“标记”链接时显示的对话框（不使用JQuery或任何其他库）。

单击“显示对话框”链接时，下面的代码会显示一个对话框。代码工作得非常好，除了一件事是，当页面文本调整大小时，对话框不会显示在链接下方，如何修复？

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Test</title>
<script type="text/javascript">

function ShowDialog(link)
{
  var dlgID = "popupDialog";
  if(!document.getElementById(dlgID))
  {
    dialog = document.createElement("div");
    dialog.id = dlgID;
    dialog.style.position = "absolute";
    dialog.style.width =  "200px";
    dialog.style.zIndex = "100";
    dialog.style.padding = "10px";
    dialog.style.backgroundColor = "#FF0000";
    dialog.innerHTML = 
      "Violation Type:<br />" +
      "<input type='radio' id='Option1' name='ViolationType' checked='checked' /><label for='Option1'> Option 1</label><br />" +
      "<input type='radio' id='Option2' name='ViolationType' /><label for='Option2'> Option 2</label><br />" +
      "<input type='radio' id='Option3' name='ViolationType' /><label for='Option3'> Option 3</label><br />" +
      "<input type='radio' id='Option4' name='ViolationType' /><label for='Option4'> Option 4</label>" +
      "<p style='text-align:right;margin-top:10px;'><input type='button' value='OK' /> <input type='button' value='Cancel' /></p>";
    document.body.appendChild(dialog);
  }
  else
  {
    dialog = document.getElementById(dlgID);
  }

  dialog.style.visibility = "visible";
  dialog.style.left = getX(link) + "px";
  dialog.style.top = getY(link) + link.offsetHeight + "px";
}

function getY(oElement)
{
  var iReturnValue = 0;
  while (oElement != null)
  {
    iReturnValue += oElement.offsetTop;
    oElement = oElement.offsetParent;
  }
  return iReturnValue;
}

function getX(oElement)
{
  var iReturnValue = 0;
  while (oElement != null)
  {
    iReturnValue += oElement.offsetLeft;
    oElement = oElement.offsetParent;
  }
  return iReturnValue;
}

</style>
</head>
<body>
Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Proin enim diam, imperdiet eget, luctus eget, rhoncus vel, lacus. Maecenas ipsum nulla, pretium vel, vehicula a, tincidunt luctus, dui. Donec adipiscing. Sed aliquet, lorem id porttitor vestibulum, libero pede pretium sem, id iaculis mauris ante a orci. Etiam mi felis, adipiscing nec, aliquet vel, hendrerit non, libero. Curabitur posuere pede vitae enim. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Proin sem. Pellentesque iaculis. Morbi at tellus a velit venenatis tempor. Vivamus quam augue, commodo sed, dapibus nec, posuere in, augue. Mauris ultrices. Integer fringilla turpis et dui. Quisque varius elementum ipsum. Aenean pede. Sed vestibulum condimentum ipsum.<br />
Lorem ipsum dolor sit amet <a href="#" onclick="ShowDialog(this);return false;">Show Dialog</a><br />Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Proin enim diam, imperdiet eget
</body>
</html>

Answer 1

这是一个在这种情况下非常有效的“黑客”。只需触发window.onresize（）事件中链接的click事件。

将以下内容添加到脚本代码的顶部：

<script type="text/javascript">
var myLink;
window.onresize = function()
{
   myDialog = document.getElementById("popupDialog");
   if(myDialog && myDialog.style.visibility == "visible")
   {         
      myLink.fireEvent("onclick");
   }
}
function ShowDialog(link)
{
  myLink = link;
  var dlgID = "popupDialog";
  if(!document.getElementById(dlgID))
  {
    dialog = document.createElement("div");
    dialog.id = dlgID;
    dialog.style.position = "absolute";
    dialog.style.width =  "200px";
    dialog.style.zIndex = "100";
    .........

在Javascript中将元素定位在另一个元素下面

1 个答案: