var imageReplacement = {

	ReplaceBackgroundImage : function(main_id, toHover, mainClass)
		{
				$(main_id).hover(
						function(){
											$('.'+mainClass).addClass(toHover);
											$('.'+mainClass).removeClass(mainClass);
										},
						function(){ 
											$('.'+toHover).addClass(mainClass);
											$('.'+toHover).removeClass(toHover);
										});
			},
		ReplaceImage : function(mainID, replaceImage, replaceWith)
		{
				function replaceBackImage(main_id, imageToReplace)
					{
							var imh = $(main_id).find('img');
							var tourl = $(imh).attr('src');
							var str = tourl.split('/');
							str[str.length-1] = imageToReplace;
								var newstrin =  str.join('/');
									$(imh).attr('src', newstrin);
					}
			 $(mainID).hover(
				function()
					{
						replaceBackImage(mainID, replaceWith);
					},
										
				function(passTo)
					{ 
						 replaceBackImage(mainID, replaceImage);
					});

		},
		desableAfterOneClick: function(Main_id, classTo){
			
			$(Main_id).click(function(){
			
					if($(this).attr('checked'))
						{
							$(classTo).attr('checked','checked');
						} 
						else 
						{
							$(classTo).attr('checked','');
						}
						
                });
		}
			

};
$(document).ready(function(){
		//Home page
		imageReplacement .ReplaceBackgroundImage ('#masthead .buttonLarge', 'buttonHover', 'buttonLarge');
		imageReplacement.ReplaceImage('.buttonMedium', 'button-find-out-more-about-the-iips.gif', 'find-out-more-hover.gif');
		imageReplacement.ReplaceImage('.news_events_button', 'button-all-news-and-events.gif', 'news-events-hover.gif');
		// Contact us and Updates forms
		imageReplacement.ReplaceImage('.submit-button', 'button-submit.gif', 'hover-button-submit.gif');
		// Search results next button
		imageReplacement.ReplaceImage('.next', 'button-pagination-next.gif', 'hover-button-pagination-next.gif');
		//Research - Publication search filter button
		imageReplacement.ReplaceImage('.submit-button-filter', 'button-filter.gif', 'hover-button-filter.gif');
		
		//Check all checkboxes updates form
		imageReplacement.desableAfterOneClick('#allTnsSubscriptions', '.subscriptionto');
		
		
});