jQuery(document).ready(function() {

		
		$(".common_button").hover(function(){
			var $img = $('img', this);
			var url = $img.attr('src');
			var filename = url.split('.')[0];
			var extension = url.split('.')[1];
			$img.attr('src', filename+'_h.'+extension);
		},function(){
			var $img = $('img', this);
			var url = $img.attr('src');
			var filename = url.split('.')[0];
			var extension = url.split('.')[1];
			if (filename.substring(filename.length-2,filename.length) == '_h') {
				$img.attr('src', filename.substring(0,filename.length-2)+'.'+extension);
			}
		});
		
	});