/**
 * rollOver on jQuery
 * rollOver tag:img,input
 * rollOver class:Over
 * rollOver FileName:*_o.*
 * Last modify:20081210
 * Licensed:MIT License
 * @author AkiraNISHIJIMA(http://nishiaki.probo.jp/)
 */
function rollOver(){  
    var preLoad = new Object();  
    $('img.Over,input.Over').not("[src*='_o.']").each(function(){  
        var imgSrc = this.src;  
        var fType = imgSrc.substring(imgSrc.lastIndexOf('.'));  
        var imgName = imgSrc.substr(0, imgSrc.lastIndexOf('.'));  
        var imgOver = imgName + '_o' + fType;  
        preLoad[this.src] = new Image();  
        preLoad[this.src].src = imgOver;  
        $(this).hover(  
            function (){  
                this.src = imgOver;  
            },  
            function (){  
                this.src = imgSrc;  
            }  
        );  
    });  
}  
$(document).ready(rollOver);