// Correctly handle PNG transparency in Win IE 5.5 or higher.
// http://homepage.ntlworld.com/bobosola. Updated 31-May-2004

// *************************************************
// This extended version includes imagemap
// and input image functionality.
// It also requires a 1px transparent GIF
// *************************************************

var strGif = "/tzr/templates/images/pixel.gif"
var strFilter = "progid:DXImageTransform.Microsoft.AlphaImageLoader"

function correctPNG() 
{
  for(var i=0; i<document.images.length; i++)  {
    var img = document.images[i]
    var imgName = img.src.toUpperCase()
    var ispng = (imgName.substring(imgName.length-3, imgName.length) == "PNG");
    if(!ispng) ispng=(img.className == "tzr-png");
    if(!ispng) ispng=(imgName.indexOf('mime=image/png')>0);
    if (ispng) {
      var imgID = (img.id) ? "id='" + img.id + "' " : ""
      var imgClass = (img.className) ? "class='" + img.className + "' " : ""
      var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "
      var imgStyle = "display:inline-block;" + img.style.cssText 
      if (img.align == "left") imgStyle = "float:left;" + imgStyle
      if (img.align == "right") imgStyle = "float:right;" + imgStyle
      if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle
      if (img.useMap) {   
	strAddMap = "<img style=\"position:relative; left:-" + img.width + "px;"
	+ "height:" + img.height + "px;width:" + img.width +"\" "
	+ "src=\"" + strGif + "\" usemap=\"" + img.useMap 
	+ "\" border=\"" + img.border + "\">"
      }
      var strNewHTML = "<span " + imgID + imgClass + imgTitle
      + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
      + "filter:" + strFilter
      + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>" ;
      if (img.useMap) strNewHTML += strAddMap
      img.outerHTML = strNewHTML
      i = i-1
    }
  }
  for(i=0; i < document.forms.length; i++) {
    findImgInputs(document.forms(i))
  }
}

function findImgInputs(oParent)
{
  var oChildren = oParent.children
    if (oChildren)  {
      for (var i=0; i < oChildren.length; i++ ) {
	var oChild = oChildren(i)
	if ((oChild.type == 'image') && (oChild.src)) {
	  var origSrc = oChild.src
	  oChild.src = strGif
	  oChild.style.filter = strFilter + "(src='" + origSrc + "')"
	}
	findImgInputs(oChild)
      }
    }
}
window.attachEvent("onload", correctPNG);