function imgChg(thisNum,thisImg,theOtherNum,theOtherImg){
	if (document.all){	//IE4
		mychg(thisNum,"on",thisImg)
		mychg(theOtherNum,"off",theOtherImg)
		eval("divMail"+thisNum+".style.visibility='visible'")
		eval("divMail"+theOtherNum+".style.visibility='hidden'")
	}
}

function mychg(num,status,thisimg){
	myimg=new Image()
	myimg.src="images/menu0"+num+"_"+status+".gif"
	eval(thisimg+".src='"+myimg.src+"'")
}