name0a=new Image;name0a.src="src_btn/button.jpg";
name0b=new Image;name0b.src="src_btn/button2.jpg";
name0c=new Image;name0c.src="src_btn/button3.jpg";
name1a=new Image;name1a.src="src_btn/schools.jpg";
name1b=new Image;name1b.src="src_btn/schools1.jpg";
name1c=new Image;name1c.src="src_btn/schools2.jpg";
name2a=new Image;name2a.src="src_btn/tea.jpg";
name2b=new Image;name2b.src="src_btn/tea1.jpg";
name2c=new Image;name2c.src="src_btn/tea2.jpg";
name3a=new Image;name3a.src="src_btn/comm.jpg";
name3b=new Image;name3b.src="src_btn/comm1.jpg";
name3c=new Image;name3c.src="src_btn/comm2.jpg";
name4a=new Image;name4a.src="src_btn/pre.jpg";
name4b=new Image;name4b.src="src_btn/pre1.jpg";
name4c=new Image;name4c.src="src_btn/pre2.jpg";
name5a=new Image;name5a.src="src_btn/sports.jpg";
name5b=new Image;name5b.src="src_btn/sports2.jpg";
name5c=new Image;name5c.src="src_btn/sports1.jpg";
name6a=new Image;name6a.src="src_btn/yb.jpg";
name6b=new Image;name6b.src="src_btn/yb2.jpg";
name6c=new Image;name6c.src="src_btn/yb1.jpg";

function lighten(imgName) {
imgOn = eval(imgName + 'b.src');
document[imgName].src = imgOn;
}

function darken(imgName) {
imgOff = eval(imgName + 'a.src');
document[imgName].src = imgOff;
}

function darken2(imgName) {
imgClick = eval(imgName + 'c.src');
document[imgName].src = imgClick;
}