function set_tr_display(contentid,labelid) {
	if ( document.getElementById(contentid).className == 'tr_show' ) {
		/*document[labelid].src='../../graphics/button_edit_01.gif';*/
		document.getElementById(labelid).style.backgroundColor='#ffffff';
		document.getElementById(contentid).className='tr_hide';
	}
	else {
		/*document[labelid].src='../../graphics/button_hide_01.gif';*/
		document.getElementById(labelid).style.backgroundColor='#ffffce';
		document.getElementById(contentid).className='tr_show';
	}
}

function check_frequency()
{
	if (document.formEvent.frequency.value == "repeats")
	{
		document.getElementById('frequency_details').className='tr_show';
	}
	else {
		document.getElementById('frequency_details').className='tr_hide';
	}
}

function check_weekdays()
{
	if (document.formEvent.frequency_span.value == "day1" || document.formEvent.frequency_span.value == "last-day" || document.formEvent.frequency_span.value == "month")
	{
		document.getElementById('weekday_label').style.color='#cecece';
		document.getElementById('weekday_days').style.color='#cecece';
		document.getElementById('weekday1').disabled=true;
		document.getElementById('weekday1').checked=false;
		document.getElementById('weekday2').disabled=true;
		document.getElementById('weekday2').checked=false;
		document.getElementById('weekday3').disabled=true;
		document.getElementById('weekday3').checked=false;
		document.getElementById('weekday4').disabled=true;
		document.getElementById('weekday4').checked=false;
		document.getElementById('weekday5').disabled=true;
		document.getElementById('weekday5').checked=false;
		document.getElementById('weekday6').disabled=true;
		document.getElementById('weekday6').checked=false;
		document.getElementById('weekday7').disabled=true;
		document.getElementById('weekday7').checked=false;
	}
	else {
		document.getElementById('weekday_label').style.color='#000000';
		document.getElementById('weekday_days').style.color='#000000';
		document.getElementById('weekday1').disabled=false;
		document.getElementById('weekday2').disabled=false;
		document.getElementById('weekday3').disabled=false;
		document.getElementById('weekday4').disabled=false;
		document.getElementById('weekday5').disabled=false;
		document.getElementById('weekday6').disabled=false;
		document.getElementById('weekday7').disabled=false;
	}
}

function limitText(limitField, limitCount, limitNum) {
	if ( limitField.value.length > limitNum ) {
		limitField.value = limitField.value.substring(0, limitNum);
	} else {
		limitCount.value = limitNum - limitField.value.length;
	}
}