// JavaScript Document

b_1on = new Image ();
b_1on.src = "images/main_btn_02.gif";
b_2on = new Image ();
b_2on.src = "images/service_btn_02.gif";
b_3on = new Image ();
b_3on.src = "images/news_btn_02.gif";
b_4on = new Image ();
b_4on.src = "images/tutorial_btn_02.gif";

b_1off = new Image ();
b_1off.src = "images/main_btn_01.gif";
b_2off = new Image ();
b_2off.src = "images/service_btn_01.gif";
b_3off = new Image ();
b_3off.src = "images/news_btn_01.gif";
b_4off = new Image ();
b_4off.src = "images/tutorial_btn_01.gif";



function imgAct (imgName)
{
imgOn = eval (imgName+"on.src");
document [imgName].src = imgOn;
}

function imgInAct (imgName)
{
imgOff = eval (imgName+"off.src");
document [imgName].src = imgOff;
}