/** this function controls the channel changing **/
function change_channel_dial(){
	var channel = eval(document.channel_form.current_channel.value)
	channel = channel + 1

	if (channel > 13) {
		channel = 2
	}
	document.channel_form.current_channel.value = channel
	eval("change_channel(channel)")
	return true

}

function change_channel(channel_number) {
	parent.sidepanel_frame.document.channel_form.current_channel.value = channel_number
	var newchannel = "channel" + channel_number + ".htm"
	var channelimg = "images/" + channel_number + ".jpg"
	var dialimg = "images/vhf_dial_black" + channel_number + ".gif"
	parent.sidepanel_frame.document.vhfimg.src = dialimg
	parent.sidepanel_frame.document.channel_number.src = channelimg
	parent.screen_frame.document.location = newchannel
	return true
}

function change_channel_rem(channel_number) {
	parent.sidepanel_frame.document.channel_form.current_channel.value = channel_number
	var newchannel = "channel" + channel_number + ".htm"
	var channelimg = "images/" + channel_number + ".jpg"
	//var dialimg = "images/vhf_dial_black" + channel_number + ".gif"
	//document.vhfimg.src = dialimg
	document.channel_number.src = channelimg
	parent.screen_frame.document.location = newchannel
	return true
}

function enter_UHF_area() {
	parent.sidepanel_frame.document.uhfimg.src = "images/uhf_dial_black90.jpg"
	var Uchannelimg = "images/U.jpg"
	var dialUimg = "images/vhf_dial_blackU.gif"
	parent.sidepanel_frame.document.vhfimg.src = dialUimg
	parent.sidepanel_frame.document.channel_number.src = Uchannelimg
	parent.screen_frame.document.location = "UHF_channel.htm"
	return true
}

function enter_UHF_area_rem() {
	//document.uhfimg.src = "images/uhf_dial_black90.jpg"
	var Uchannelimg = "images/U.jpg"
	//var dialUimg = "images/vhf_dial_blackU.gif"
	//document.vhfimg.src = dialUimg
	parent.sidepanel_frame.document.channel_number.src = Uchannelimg
	parent.screen_frame.document.location = "UHF_channel.htm"
	return true
}

function change_channel_desc(channel_number) {
	var channelDescImg = "images/channel_desc" + channel_number + ".gif"
	parent.sidepanel_frame.document.channelDesc.src = channelDescImg
	return true
}