//correctly handle PNG transparency in Win IE 5.5 & 6.
function correctPNG() 
{
   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
         }
      }
   }    
}

// a image preloader
(function($) {
  var cache = [];
  // Arguments are image paths relative to the current page.
  $.preLoadImages = function() {
    var args_len = arguments.length;
    for (var i = args_len; i--;) {
      var cacheImage = document.createElement('img');
      cacheImage.src = arguments[i];
      cache.push(cacheImage);
    }
  }
})(jQuery)



var initialTextEmail = 'Email address';
var initialTextFirstname = 'First name';
var initialTextLastname = 'Last name';

$(function(){
	
	// lets preload the images that we need
	jQuery.preLoadImages("submit-hover", "images/buttons/submit-your-details-hover.gif");
	
	populateField('firstname', initialTextFirstname);
	populateField('lastname', initialTextLastname);
	populateField('email', initialTextEmail);
	
	bindClickEvent('firstname', initialTextFirstname);
	bindClickEvent('lastname', initialTextLastname);
	bindClickEvent('email', initialTextEmail);
	
	bindBlurEvent('firstname', initialTextFirstname);
	bindBlurEvent('lastname', initialTextLastname);
	bindBlurEvent('email', initialTextEmail);
	
	
	$("input#submitform").hover(function(){
			this.src = 'images/buttons/submit-your-details-hover.gif';
		},
		function(){
			this.src = 'images/buttons/submit-your-details.gif';
		
		}
	);
	
	$("input#submitform").click(function(){
		// get rid of any initialTexts from the fields...
		beforeSubmitCheck('firstname', initialTextFirstname);
		beforeSubmitCheck('lastname', initialTextLastname);
		beforeSubmitCheck('email', initialTextEmail);
	});

});


function bindClickEvent(id, initialText)
{
	$('input#' + id).click(function(){
		if($(this).val() == initialText)
		{
			$(this).val('');
		}
	});
}

function bindBlurEvent(id, initialText)
{
	$('input#' + id).blur(function(){
		if($(this).val() == '')
		{
			$(this).val(initialText);
		}
	});
}

function populateField(id, initialText)
{
	if($('input#' + id).val() == '')
	{
		$('input#' + id).val(initialText);
	}
}

function beforeSubmitCheck(id, initialText)
{
	if($('input#' + id).val() == initialText)
	{
		$('input#' + id).val('');
	}
}