// JavaScript Document

browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);

ns3up = (browserName == "Netscape" && browserVer >= 3);
ie4up = (browserName.indexOf("Microsoft") >= 0 && browserVer >= 4);

function doPic(imgName) {
if (ns3up || ie4up) {
imgOn = ("" + imgName);
document.mainpic.src = imgOn;
   }
}

/* 先読みする画像の配列 */
var images_ary=new Array(
        '/images/to_list_on_16.gif',
        '/images/index_eventreport_on.jpg',
        '/images/index_faq_on.jpg',
        '/images/index_sumai_on.jpg',
        '/images/index_catalog_on.jpg',
        '/images/util_on_03.jpg',
        '/images/util_on_05.jpg',
        '/images/util_on_07.jpg',
        '/images/subnavi_on_03.jpg',
        '/images/subnavi_on_06.jpg',
        '/images/subnavi_on_08.jpg',
        '/images/subnavi_on_10.jpg'
        );
/* 画像先読み処理関数 */
function preLoad(imgAry) {
            var imgMax=imgAry.length;
            var images=new Array(imgMax);
            for (var i=0; i<imgMax; i++) {
                images[i]=new Image();
                images[i].src=imgAry[i];
            }
}