but1on = new Image(); but1on.src = "/_images/but11.gif"; but1off = new Image(); but1off.src = "/_images/but10.gif"; but2on = new Image(); but2on.src = "/_images/but21.gif"; but2off = new Image(); but2off.src = "/_images/but20.gif"; but3on = new Image(); but3on.src = "/_images/but31.gif"; but3off = new Image(); but3off.src = "/_images/but30.gif"; but4on = new Image(); but4on.src = "/_images/but41.gif"; but4off = new Image(); but4off.src = "/_images/but40.gif"; function butON(imgName) { imgOn = eval(imgName + "on.src"); document [imgName].src = imgOn; } function butOFF(imgName) { imgOff = eval(imgName + "off.src"); document [imgName].src = imgOff; }