// JavaScript Document

var rollImgSRC = ['../images/linkNavi_homo_roll.jpg','../images/linkNavi_about_roll.jpg','../images/linkNavi_menu_roll.jpg',
				  '../images/linkNavi_howto_roll.jpg','../images/linkNavi_blog_roll.jpg','../images/linkNavi_inquary_roll.jpg',
				  '../images/rightLinkNavi_season_roll.jpg','../images/rightLinkNavi_basic_roll.jpg','../images/_roll.jpg','../images/rightLinkNave_bacin_roll.gif'];
preLoadImg(rollImgSRC);
$('body')
	.ready(
		 function() {
			$('ul.navigation li a')
			.bind('mouseover', function(){contiBtnRollOver(this);})
			.bind('mouseout', function(){contiBtnRollOut(this);});
			$('dd.menuPhoto a')
			.bind('mouseover', function(){contiBtnRollOver(this);})
			.bind('mouseout', function(){contiBtnRollOut(this);})
		}
	);
				

function contiBtnRollOver(t){
		orgImgSrc = $(t).children().attr('src');
		overImgSrc = orgImgSrc.replace(/(\.gif|\.jpg|\.png)/,"_roll$1");
		$(t).children().attr('src',overImgSrc);
	};
	
	function contiBtnRollOut(t){
		if(orgImgSrc) {
		$(t).children().attr('src',orgImgSrc);
		}
	};
	
	function preLoadImg(val){
		var imgObj = new Object();
		for(var i = 0; i < val.length; i++){
			imgObj["img"+ i] = new Image();
			imgObj["img"+ i] .src = val[i];
		}
	};