var DL_HideSelects = true;
var DL_HideObjects = false;
var DL_HideIframes = false;
var DL_ie = document.all && navigator.userAgent.indexOf("Opera") == -1;
var DL_Banner; // Will be bound to the DIV element representing the layer
var DL_ScrollState = 0;
var DL_width, DL_height, DL_dimension;


function DL_GetWH() {
  //
  // per: http://www.quirksmode.org/viewport/compatibility.html
  //
  if (self.innerWidth) {
    // Mozilla, Safari, Opera, Netscape 4.0
    DL_width = self.innerWidth;
    DL_height = self.innerHeight;
  } else if (document.documentElement && document.documentElement.clientHeight > 0) {
    // IE6 in Strict Mode
    DL_width = document.documentElement.clientWidth;
    DL_height = document.documentElement.clientHeight;
  } else if (document.body) {
    DL_width = document.body.clientWidth;
    DL_height = document.body.clientHeight;
  }
  // Default to 640x480 if the above information is missing or not well-formed
  if(parseInt(DL_width) == 0 || parseInt(DL_height) == 0) {
    DL_width = 640;
    DL_height = 480;
  }
  DL_dimension = DL_width}

DL_GetWH();

function DL_reposition(){
  // Make sure the layer is where it should be vertically.
  // This is executed in a loop.
  var scrollpos;
  var edge = 0;

  //
  // Scroll Pos per: http://www.quirksmode.org/viewport/compatibility.html
  //
  if (self.innerHeight) {// all except Explorer
	// somehow self.pageYOffset is zero at times which messes up for us :(
	scrollx = self.pageYOffset;
	scrolly = self.pageXOffset;

		edge    = self.innerHeight; 
	  } else if (document.documentElement && document.documentElement.clientHeight > 0) {
    // IE 6 in strict mode
    scrollx = document.documentElement.scrollTop;
    scrolly = document.documentElement.scrollLeft;
        edge = document.documentElement.clientHeight;
      } else if (document.body) {
    // relative sanity
    scrollx = document.body.scrollTop;
    scrolly = document.body.scrollLeft;
        edge = document.body.clientHeight;
      }
    if (DL_ie || document.getElementById){
    DL_Banner.style.top = (parseInt(scrollx) + parseInt(edge) + -280)+'px';
    DL_Banner.style.left = (parseInt(scrolly) + DL_Banner.absolute)+'px';
  }
}

function DL_DoHideSelects() {
  // Optional: Hide all the Select (drop-down menu) controls on the page.
  // If this isn't done, selects can be visible on top of the invitation layer.
  var selects = document.getElementsByTagName('select');
  for(i = 0; i < selects.length; i++) {
    selects[i].style.visibility = 'hidden';
  }
}

function DL_DoHideIframes() {
  var objects = document.getElementsByTagName('iframe');
  for(i = 0; i < objects.length; i++) {
    objects[i].style.visibility = 'hidden';
  }
}

function DL_DoHideObjects() {
  var objects = document.getElementsByTagName('object');
  for(i = 0; i < objects.length; i++) {
    if (objects[i].id != 'DL_object')
      objects[i].style.visibility = 'hidden';
  }
  objects = document.getElementsByTagName('embed');
  for(i = 0; i < objects.length; i++) {
    if (objects[i].id != 'DL_embed')
      objects[i].style.visibility = 'hidden';
  }
}

function DL_DoShowSelects() {
  // The reverse of DL_DoHideSelects
  selects = document.getElementsByTagName('select');
  for(i = 0; i < selects.length; i++) {
    selects[i].style.visibility = 'visible';
  }
}

function DL_DoShowIframes() {
  var objects = document.getElementsByTagName('iframe');
  for(i = 0; i < objects.length; i++) {
    objects[i].style.visibility = 'visible';
  }
}

function DL_DoShowObjects() {
  // The reverse of DL_DoHideObjects
  objects = document.getElementsByTagName('object');
  for(i = 0; i < objects.length; i++) {
    objects[i].style.visibility = 'visible';
  }
  objects = document.getElementsByTagName('embed');
  for(i = 0; i < objects.length; i++) {
    objects[i].style.visibility = 'visible';
  }
}

var DL_PauseStart = 0;
function DL_Scroll() {
  // Moves the layer
  // The global DL_ScrollState governs where the layer is in
  // its trajectory.  State 0 means it hasn't appeared yet,
  // state -1 means it's finished and should not appear again.
  DL_GetWH();
  switch (DL_ScrollState) {
  case 0:  // Layer has not yet appeared
    DL_Banner.style.visibility = 'visible';
    // Change the state.  If we have a gutter, and the invitation
    // image fits in it, switch to state 3.  Otherwise, state 1.
    DL_ScrollState =        1;
        // Further preparation: set the image to its starting position
    // and, if desired, hide any <select> components in the page.
      DL_Banner.absolute = -250;
    DL_reposition();
    if(DL_HideSelects) {
      DL_DoHideSelects();
    }
    if(DL_HideIframes) {
      DL_DoHideIframes();
    }
    if(DL_HideObjects) {
      DL_DoHideObjects();
    }
    // The invitation is now visible.  Set the LP cookie to record
    // the current time.
    // (Since this script is running in a different domain,
    // the only way to do this is by loading a file from our domain.)
    var now = Math.floor(new Date().getTime()/1000);
    document.DL_placeholder.src = "http://amch.questionmarket.com/adscgen/lpset.php?"+now;
  case 1: // Layer is moving to the right, to pause at the center.
    DL_GetWH();
    DL_reposition();
    var x = parseInt(DL_Banner.absolute);
    if (x<DL_dimension/2-125) {
      x = x +5 ;
      //DL_Banner.style.left = x+'px';
      DL_Banner.absolute = x;
      setTimeout('DL_Scroll()',15);
    } else {
      DL_ScrollState = 4; // end movement
      DL_PauseStart = new Date();
      setTimeout('DL_Scroll()', 50);
    }
    break;
  case 2: // Layer disappears
    DL_Banner.style.left = -250;
    DL_Banner.style.top = -250;
    DL_Banner.style.visibility = 'hidden';
    if(DL_HideSelects) {
      DL_DoShowSelects();
    }
    if(DL_HideIframes) {
      DL_DoShowIframes();
    }
    if(DL_HideObjects) {
      DL_DoShowObjects();
    }
    DL_ScrollState = -1;
    break;
  case 3: // Layer is moving right, to stop at the edge of the screen
    DL_GetWH();
    var x = parseInt( DL_Banner.absolute );
    // If it's not at the right edge yet, shift right
    if (x < DL_width - 250 - 4) {
      x = x + 5;
      DL_reposition();
      DL_Banner.absolute = x;
      setTimeout('DL_Scroll()',15);
    } else {
      // Otherwise, finish up:
      // Restore the <select>s
      if(DL_HideSelects) {
        DL_DoShowSelects();
      }
      if(DL_HideIframes) {
        DL_DoShowIframes();
      }
      if(DL_HideObjects) {
        DL_DoShowObjects();
      }
      DL_ScrollState = 5; // Hover at edge
      DL_PauseStart = new Date();
      setTimeout('DL_Scroll()', 50);
    }
    break;
  case 4: // Layer is pausing in the center.
    // The window might have been resized.  We must reposition the layer.
    if (new Date() - DL_PauseStart < 15000) {
      DL_GetWH();
      DL_Banner.absolute = (DL_dimension/2 - 125);
      DL_reposition();
      setTimeout('DL_Scroll()', 50);
    } else {
      DL_ScrollState = 2;
      DL_Scroll();
    }
    break;
  case 5:
    DL_reposition();
    // Delay removed.  Hover in the gutter forever.
    //if (new Date() - DL_PauseStart < 10000) { // hover for 10 seconds
      DL_Banner.style.left = (DL_width - 250 - 4)+'px';
      setTimeout('DL_Scroll()', 50);
    //} else {
    //  DL_ScrollState = 2;
    //  DL_Scroll();
    //}
    break;
  }
}

function DL_GotoSurvey() {
    // To the rest of the parameters, append a link back to the current document
  window.top.location.href="http://amch.questionmarket.com/adsc/d210208/dynamiclinkf.php?survey_server=survey.questionmarket.com&survey_num=210208&site=4&code=11918090&frame=&dl_logo=&invite=no&link="+escape(window.location.href)+"&orig="+escape(window.location.href);
  }

function DL_Close() {
  // Set a flag so that the animation loop will stop running
  DL_ScrollState = 2;
  DL_Scroll();
}

function DL_Init() {
  // Set a timer to load the survey after the given delay
  setTimeout('DL_Scroll()', 8000);
}

function DL_FlashInstalled() {
  // Detect swf plugin.  Adapted from http://javascript.about.com/library/scripts/blflashdetect.htm
  var result = false;
  if (navigator.mimeTypes && navigator.mimeTypes["application/x-shockwave-flash"])
    result = navigator.mimeTypes["application/x-shockwave-flash"].enabledPlugin;
  else if (document.all && (navigator.appVersion.indexOf("Mac")==-1)) {
    // IE Windows only -- check for ActiveX control, have to hide code in eval from Netscape (doesn't like try)
    eval ('try {var xObj = new ActiveXObject("ShockwaveFlash.ShockwaveFlash");if (xObj)	result = true; xObj = null;	} catch (e)	{}');
  }
  return result;
}

function DL_InsertGif(imgname) {  
  // Variation 1: The invitation is an image.
  if (!imgname) imgname = 'http://amch.questionmarket.com/static/opinion_li-250x250-1l-eng-nul.gif';

  // Inside the DIV tag: the image.  Outside: the imagemap.
	DL_InsertObject('<MAP NAME="closeortake"><area coords="175,0,250,30" href="#" onClick="DL_Close(); return false; "><area  coords="0,0,250,250" href=# onClick=\'DL_GotoSurvey(); return false;\'></MAP>', '<img src="'+imgname+'" usemap="#closeortake" border="0" onload="DL_Init();" >');
}

function DL_InsertSwf() {
  // Variation 2: The invitation is a Flash object.
  // First, make sure the browser can handle Flash.
  if (DL_FlashInstalled()) {
    // Inside the DIV tag: the object.  Outside: nothing; Flash handles its own click events.
	DL_InsertObject('', '<OBJECT classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=3,0,0,0" WIDTH="250" HEIGHT="250" id="DL_object"><PARAM NAME=movie VALUE="http://amch.questionmarket.com/static/opinion_li-250x250-1l-eng-nul.gif?clickTag=JAVASCRIPT:DL_GotoSurvey();&clickTag2=JAVASCRIPT:DL_Close();"> <PARAM NAME=loop VALUE=false> <PARAM NAME=quality VALUE=high> <PARAM NAME=scale VALUE=exactfit> <PARAM NAME=bgcolor VALUE=#CCCCCC><PARAM NAME=wmode VALUE=transparent><EMBED src="http://amch.questionmarket.com/static/opinion_li-250x250-1l-eng-nul.gif?clickTag=JAVASCRIPT:DL_GotoSurvey();&clickTag2=JAVASCRIPT:DL_Close();" loop=false quality=high scale=exactfit bgcolor=#CCCCCC swLiveConnect=FALSE WIDTH="250" HEIGHT="250" TYPE="application/x-shockwave-flash" PLUGINSPAGE="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" id="DL_embed"></EMBED></OBJECT>');
        DL_Init();
  } else {
    // If Flash is disabled or not installed, use a gif instead.
    var imgname = "http://amch.questionmarket.com/static/opinion_li-250x250-1l-eng-nul.gif";
    DL_InsertGif(imgname.slice(0, -3)+"gif");
  }
}

function DL_InsertObject(nonDivText, divText) {
  // Create a new element using DOM.
  // The 'insert' tag is a meaningless container.
  var insert = document.createElement('span');
  // Create a DIV element within 'insert'.  This is our dlayer.
  insert.innerHTML = nonDivText + '<div style="position:absolute; top:-250px; left:-250px; width:250px; z-index: 10000000" id="dhtmlbanner">' + divText + '<img name=DL_placeholder width=0 height=0></div>';
  // Add 'insert' and its DIV to the document body
  var b = document.getElementsByTagName('body').item(0);
  b.appendChild(insert);
  // Bind the DIV to the global variable DL_Banner, so other functions can use it
  DL_Banner = document.getElementById('dhtmlbanner');
}

var DL_already_ran;
if (!DL_already_ran) {
    DL_InsertGif();
    DL_already_ran = 1;
}