function turnOff(sGraphicName)
{
	eval("document." + sGraphicName + ".src=document." + sGraphicName + ".src.substring(0,document." + sGraphicName + ".src.lastIndexOf('/')+1)+'" + sGraphicName + "'+'_off.gif'");
}

function turnOn(sGraphicName)
{
	eval("document." + sGraphicName + ".src=document." + sGraphicName + ".src.substring(0,document." + sGraphicName + ".src.lastIndexOf('/')+1)+'" + sGraphicName + "'+'_over.gif'");
}