// FROM: http://www.hunlock.com/blogs/Working_around_IE7s_prompt_bug,_er_feature

///////////////////////////////////////////////////////////
// Usage IEprompt("dialog descriptive text", "default starting value");
//
// IEprompt will call promptCallback(val)
// Where val is the user's input or null if the dialog was canceled.
///////////////////////////////////////////////////////////

///////////////////////////////////////////////////////////
// This source code has been released into the public domain
// January 14th, 2007.
// You may use it and modify it freely without compensation
// and without the need to tell everyone where you got it.
///////////////////////////////////////////////////////////


///////////////////////////////////////////////////////////
// You must create a promptCallback(val) function to handle
// the user input.  If you don't this script will fail and
// Bunnies will die.
///////////////////////////////////////////////////////////


function findPosX(obj)
{
  var curleft = 0;
  if (obj.offsetParent)
  {
    do
    {
      curleft += obj.offsetLeft;
    }
    while (obj = obj.offsetParent);
  }
  return curleft;
}

function findPosY(obj)
{
  var curtop = 0;
  if (obj.offsetParent)
  {
    do
    {
      curtop += obj.offsetTop;
    }
    while (obj = obj.offsetParent);
  }
  return curtop;
}

function getSizeY()
{
  var myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' )
  {
    //Non-IE
    myHeight = window.innerHeight;
  }
  else if( document.documentElement && document.documentElement.clientHeight)
  {
    //IE 6+ in 'standards compliant mode'
    myHeight = document.documentElement.clientHeight;
  }
  else if( document.body && document.body.clientHeight )
  {
    //IE 4 compatible
    myHeight = document.body.clientHeight;
  }
  return myHeight;
}

function getScrollY()
{
  var scrOfY = 0;
  if( typeof( window.pageYOffset ) == 'number' )
  {
    //Netscape compliant
    scrOfY = window.pageYOffset;
  }
  else if( document.body && document.body.scrollTop )
  {
    //DOM compliant
    scrOfY = document.body.scrollTop;
  }
  else if( document.documentElement && document.documentElement.scrollTop )
  {
    //IE6 standards compliant mode
    scrOfY = document.documentElement.scrollTop;
  }
  return scrOfY;
}

///////////////////////////////////////////////////////////
// These are global scope variables, they should remain global.
///////////////////////////////////////////////////////////
var _dialogPromptID=null;
///////////////////////////////////////////////////////////

function IEprompt(callingobj,innertxt,def,ok,cancel) {

   that=this;

   // Check to see if this is MSIE 7.   This isn't a great general purpose
   // detection system but it works well enough just to find MSIE 7.
   var _isIE7= true; // ((navigator.userAgent.indexOf('MSIE 7')>0) || (navigator.userAgent.indexOf('MSIE 8')>0));

   this.wrapupPrompt = function (cancled) {
      // wrapupPrompt is called when the user enters or cancels the box.
      // It's called only by the IE7 dialog box, not the non IE prompt box
      if (_isIE7) {
         // Make sure we're in IE7 mode and get the text box value
         val=document.getElementById('iepromptfield').value;
         // clear out the dialog box
         _dialogPromptID.style.display='none';
         // clear out the text field
         document.getElementById('iepromptfield').value = '';
         // if the cancel button was pushed, force value to null.
         if (cancled) { val = '' }
         // call the user's function
         promptCallback(val);
      }
      return false;
   }

   //if def wasn't actually passed, initialize it to null
   if (def==undefined) { def=''; }

   if (_isIE7) {
      // If this is MSIE 7.0 then...
      if (_dialogPromptID==null) {
         // Check to see if we've created the dialog divisions.
         // This block sets up the divisons
         // Get the body tag in the dom
         var tbody = document.getElementsByTagName("body")[0];
         // create a new division
         tnode = document.createElement('div');
         // name it
         tnode.id='IEPromptBox';
         // attach the new division to the body tag
         tbody.appendChild(tnode);
         // and save the element reference in a global variable
         _dialogPromptID=document.getElementById('IEPromptBox');
         // Create a new division (blackout)
         tnode = document.createElement('div');
         // name it.
         tnode.id='promptBlackout';
         // attach it to body.
         tbody.appendChild(tnode);
         // And get the element reference
         // assign the styles to the dialog box
         _dialogPromptID.style.border='2px outset #666666';
         _dialogPromptID.style.backgroundColor='#EEEEEE';
         _dialogPromptID.style.position='absolute';
         _dialogPromptID.style.width='330px';
         _dialogPromptID.style.zIndex='100';
      }
      // This is the HTML which makes up the dialog box, it will be inserted into
      // innerHTML later. We insert into a temporary variable because
      // it's very, very slow doing multiple innerHTML injections, it's much
      // more efficient to use a variable and then do one LARGE injection.
      var tmp = '<div style="padding:10px;text-align:center;">'+innertxt + '<br /><br />';
      tmp += '<form action="" onsubmit="return that.wrapupPrompt()">';
      tmp += '<input id="iepromptfield" name="iepromptdata" type="text" size="40" value="'+def+'">';
      tmp += '<br /><br />';
      tmp += '<input type="submit" value="&nbsp;'+ok+'&nbsp;">';
      tmp += '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
      tmp += '<input type="button" onclick="that.wrapupPrompt(true)" value="&nbsp;'+cancel+'&nbsp;">';
      tmp += '</form></div>';
      // Insert the tmp HTML string into the dialog box.
      // Then position the dialog box on the screen and make it visible.
      _dialogPromptID.innerHTML=tmp;
//      _dialogPromptID.style.top=parseInt(document.documentElement.scrollTop+(screen.height/4))+'px';
//      _dialogPromptID.style.left=parseInt((document.body.offsetWidth-315)/2)+'px';
      _dialogPromptID.style.top=parseInt(findPosY(callingobj)-30)+'px';
      _dialogPromptID.style.left=parseInt(findPosX(callingobj)-290)+'px';
      _dialogPromptID.style.display='block';
      // Give the dialog box's input field the focus.
      document.getElementById('iepromptfield').focus();
   } else {
      // we are not using IE7 so do things "normally"
      promptCallback(prompt(innertxt,def));
   }
}