// show edit menu
function showEditNav(menuNumber)
					{
					 	document.getElementById('DropNav'+menuNumber).style.display = "block";
					}

// hide edit menu
function hideEditNav(menuNumber)
					{
					 	document.getElementById('DropNav'+menuNumber).style.display = "none";
					}

// get date to display in copyright section of the footer.
function showYear()
					{
						var theDate = new Date();
						document.write(theDate.getFullYear());
					}
		
			
			
			
// reset search field
function clearSearch()
					{
 						document.getElementById('searchField').value = '';
					}
					

			
			
// populate search field
function addSearchTxt()
					{
						var srchFld = document.getElementById('searchField').value;
						
						 if (srchFld == '')
								{
									document.getElementById('searchField').value = 'Site search...';
								}
					}

					
					
function correctPNG() // correctly handle PNG transparency in Win IE 5.5 & 6.
{
   //var switchOff = "http://www.chapter5.co.nz/cssController/css.js"
   var arVersion = navigator.appVersion.split("MSIE")
   var version = parseFloat(arVersion[1])
   if ((version >= 5.5) && (document.body.filters)) 
   {
      for(var i=0; i<document.images.length; i++)
      {
         var img = document.images[i]
         var imgName = img.src.toUpperCase()
         if (imgName.substring(imgName.length-3, imgName.length) == "PNG")
         {
            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
            var strNewHTML = "<span " + imgID + imgClass + imgTitle
            + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
            + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
            + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>" 
            img.outerHTML = strNewHTML
            i = i-1
         }
      }
   }    
}
window.attachEvent("onload", correctPNG);