var agent = navigator.userAgent;
		var appver = navigator.appVersion;
		var nav = navigator.appName;
		var plf = null;
		var ver = null;
		if(agent.indexOf('Mac') != -1){
			plf = "Mac";
		}else if(agent.indexOf('Win') != -1){
			plf = "Win";
		}else{
			plf = "other";
		}
		if(agent.indexOf('MSIE') == -1){
			ver = appver.charAt(0);
			if(nav == "Netscape"){
				nav = "NN";
			}
		}else{
			ver = agent.charAt(agent.indexOf('MSIE') + 5);
			nav = "MSIE";
		}

		function preLoad(){
		}
		function changeImage(fileName, imageName){
		}
		
		var imageDir = "../images/";
        var loadList;
        var action = "off";
        function preLoad() {
                loadList = new Array("tmenu01_on.gif", "tmenu02_on.gif", "tmenu03_on.gif", "tmenu04_on.gif", "tmain_mado02.gif", "tmain_mado03.gif", "tmain_mado04.gif", "tmain_mado05.gif");
                onImages = new Array();
                for (field in loadList)
                {
                        onImages[field] = new Image();
                        onImages[field].src = imageDir + loadList[field];
                }
                action = "on";
        }
        function changeImage(fileName, imageName,fileName2, imageName2,fileName3, imageName3,fileName4, imageName4,fileName5, imageName5) 
        {
                if (action == "on") {
                        document.images[imageName].src = imageDir + fileName;
                        document.images[imageName2].src = imageDir + fileName2;
						document.images[imageName3].src = imageDir + fileName3;
						document.images[imageName4].src = imageDir + fileName4;
						document.images[imageName5].src = imageDir + fileName5;
                }
        }