//Main Button Event Start
if (parseInt(navigator.appVersion.substring(0,1))>=3){
Home_1 = new Image();
Home_1.src = "http://www.jl-studio.hk/Image/Home_1.gif";
Home_2 = new Image();
Home_2.src = "http://www.jl-studio.hk/Image/Home_2.gif";

Theme_1 = new Image();
Theme_1.src = "http://www.jl-studio.hk/Image/Theme_1.gif";
Theme_2 = new Image();
Theme_2.src = "http://www.jl-studio.hk/Image/Theme_2.gif";

Cursor_1 = new Image();
Cursor_1.src = "http://www.jl-studio.hk/Image/Cursor_1.gif";
Cursor_2 = new Image();
Cursor_2.src = "http://www.jl-studio.hk/Image/Cursor_2.gif";

WPaper_1 = new Image();
WPaper_1.src = "http://www.jl-studio.hk/Image/WPaper_1.gif";
WPaper_2 = new Image();
WPaper_2.src = "http://www.jl-studio.hk/Image/WPaper_2.gif";

Software_1 = new Image();
Software_1.src = "http://www.jl-studio.hk/Image/Software_1.gif";
Software_2 = new Image();
Software_2.src = "http://www.jl-studio.hk/Image/Software_2.gif";

GBook_1 = new Image();
GBook_1.src = "http://www.jl-studio.hk/Image/GBook_1.gif";
GBook_2 = new Image();
GBook_2.src = "http://www.jl-studio.hk/Image/GBook_2.gif";

Blog_1 = new Image();
Blog_1.src = "http://www.jl-studio.hk/Image/Blog_1.gif";
Blog_2 = new Image();
Blog_2.src = "http://www.jl-studio.hk/Image/Blog_2.gif";

Study_1 = new Image();
Study_1.src = "http://www.jl-studio.hk/Image/Study_1.gif";
Study_2 = new Image();
Study_2.src = "http://www.jl-studio.hk/Image/Study_2.gif";

MyLink_1 = new Image();
MyLink_1.src = "http://www.jl-studio.hk/Image/MyLink_1.gif";
MyLink_2 = new Image();
MyLink_2.src = "http://www.jl-studio.hk/Image/MyLink_2.gif";

About_1 = new Image();
About_1.src = "http://www.jl-studio.hk/Image/About_1.gif";
About_2 = new Image();
About_2.src = "http://www.jl-studio.hk/Image/About_2.gif";

ArrowUp_1 = new Image();
ArrowUp_1.src = "http://www.jl-studio.hk/Image/ArrowUp_1.gif";
ArrowUp_2 = new Image();
ArrowUp_2.src = "http://www.jl-studio.hk/Image/ArrowUp_2.gif";

ArrowDoubleLeft_1 = new Image();
ArrowDoubleLeft_1.src = "http://www.jl-studio.hk/Image/ArrowDoubleLeft_1.gif";
ArrowDoubleLeft_2 = new Image();
ArrowDoubleLeft_2.src = "http://www.jl-studio.hk/Image/ArrowDoubleLeft_2.gif";

ArrowLeft_1 = new Image();
ArrowLeft_1.src = "http://www.jl-studio.hk/Image/ArrowLeft_1.gif";
ArrowLeft_2 = new Image();
ArrowLeft_2.src = "http://www.jl-studio.hk/Image/ArrowLeft_2.gif";

ArrowRight_1 = new Image();
ArrowRight_1.src = "http://www.jl-studio.hk/Image/ArrowRight_1.gif";
ArrowRight_2 = new Image();
ArrowRight_2.src = "http://www.jl-studio.hk/Image/ArrowRight_2.gif";

ArrowDoubleRight_1 = new Image();
ArrowDoubleRight_1.src = "http://www.jl-studio.hk/Image/ArrowDoubleRight_1.gif";
ArrowDoubleRight_2 = new Image();
ArrowDoubleRight_2.src = "http://www.jl-studio.hk/Image/ArrowDoubleRight_2.gif";

}

function ButtonChange(name, status){
	if (parseInt(navigator.appVersion.substring(0,1))>=3){
		image = eval(name + (status == 0 ? "_1.src" : "_2.src"));
		if (image != ""){
			document[name].src = image;
		}
	}
}
//Main Button Event End

function file_exists (url) {
    var req = this.window.ActiveXObject ? new ActiveXObject("Microsoft.XMLHTTP") : new XMLHttpRequest();
    if (!req) {throw new Error('XMLHttpRequest not supported');}
      
    // HEAD Results are usually shorter (faster) than GET
    req.open('HEAD', url, false);
    req.send(null);
    if (req.status == 200){
        return true;
    }
    
    return false;
}