var fp = "document.all."
var lp = ".style"
function turnon(td) {
var objon = eval(fp + td + lp)
objon.backgroundColor='yellow'
}
function turnoff(td) {
var objoff = eval(fp + td + lp)
objoff.backgroundColor='lightyellow'
}
function light(td) {
var objon = eval(fp + td + lp)
objon.backgroundColor='yellow'
objon.color='black'
}
function delight(td) {
var objoff = eval(fp + td + lp)
objoff.backgroundColor='black'
objoff.color='yellow'
}