// hover over for main nav
	window.addEvent('domready',function() {
				
		$$('td.sidelinks img, td.navigation img').each(function(el) {
			el.addEvent('mouseover',function(e) { if(!el.hasClass('current')) el.setProperty('src',el.getProperty('src').replace('.png','_on.png')); }.bind(this));
			el.addEvent('mouseout',function(e) { if(!el.hasClass('current')) el.setProperty('src',el.getProperty('src').replace('_on.png','.png')); }.bind(this));
			// pre-load the images
	
			var img = new Image();
	
			img.src = el.getProperty('src').replace('.png','_on.png');
		});
		
		if(Browser.Engine.trident){
		
			var l = $('mainleft').getElement('table').getSize().y;
			var c = $('maincentre').getElement('table').getSize().y;
			var r = $('mainright').getElement('table').getSize().y;
			var ie8 = 0;
			var set;
			
			if(l >= c && l >= r){
				// l is biggest	
				set = l + 15;
			} else if(c >= l && c >= r){
				// c is biggest
				set = c + 15;
			} else {
				// r is biggest
				set = r + 15;
				if(navigator.userAgent.indexOf("MSIE 8") != -1) ie8 = 19;
			}
									
			$('mainleft').getElement('td.addresspad').setStyle('height',set-l+ie8);
			$('maincentre').getElement('td.middlepad').setStyle('height',set-c);	
			$('mainright').getElement('td.rhlinkspad').setStyle('height',set-r);	
		}

			
	});