function SetDefault (form, sOVN) {
	var oDate = new Date( eval("form."+sOVN+".value") );
//alert(oDate.toString());
	//if the "date" is time only, it'll throw NaN; this catches it and creates a valid date object
	if (oDate.toString() == 'NaN') oDate = new Date("1/1/00 "+ eval("form."+sOVN+".value"));
	if (eval("form."+sOVN+".value") == '') oDate = new Date();
	SetDateFields (form, sOVN, oDate);
}
function SetToNow (form, sOVN) {
	SetDateFields (form, sOVN, new Date());
}
function SetToOther (form, sOVN, sOVNsrc) {
	SetDateFields (form, sOVN, new Date(form[sOVNsrc].value));
}
function SetDateFields (form, sOVN, oDate) {
	if (eval("form.month_"+sOVN) != null) {
		SetSelectValue (eval("form.month_"+sOVN), 1+oDate.getMonth());
		SetSelectValue (eval("form.day_"+sOVN), oDate.getDate());
		SetSelectValue (eval("form.year_"+sOVN), oDate.getFullYear());
	}
	if (eval("form.hour_"+sOVN) != null) {
		SetSelectValue (eval("form.hour_"+sOVN), oDate.getHours() % 12  == 0 ? '12' : oDate.getHours() % 12);
		SetSelectValue (eval("form.minute_"+sOVN), Math.floor(oDate.getMinutes()/5)*5);	//this converts minutes into intervals of 5 (rounding down)
		SetSelectValue (eval("form.ampm_"+sOVN), oDate.getHours() < 12 ? 'AM' : 'PM');
	}
	UpdateDateTime (form, sOVN);
}
function SetSelectValue (oSelect, sOptionVal) {
	for (var i=0; i < oSelect.length; i++)
		if (oSelect.options[i].value == sOptionVal) oSelect.options[i].selected=true;
}
// every time a select box changes, this method is called to keep the hidden input in sync
function UpdateDateTime (form, sOVN) {
	if (eval ("form.hour_"+sOVN) == null) 
		eval ("form."+sOVN+".value = GetValue(form.month_"+sOVN+") +\"/\"+ GetValue(form.day_"+sOVN+") +\"/\"+ GetValue(form.year_"+sOVN+");");
	else if (eval ("form.month_"+sOVN) == null) //  \"1/1/00 \"+ 
		eval ("form."+sOVN+".value = GetValue(form.hour_"+sOVN+") +\":\"+ GetValue(form.minute_"+sOVN+") +\" \"+ GetValue(form.ampm_"+sOVN+");");		
	else
		eval ("form."+sOVN+".value = GetValue(form.month_"+sOVN+") +\"/\"+ GetValue(form.day_"+sOVN+") +\"/\"+ GetValue(form.year_"+sOVN+") +\" \"+ GetValue(form.hour_"+sOVN+") +\":\"+ GetValue(form.minute_"+sOVN+") +\" \"+ GetValue(form.ampm_"+sOVN+");");
}
//returns the value of element, be it a select, text or hidden
function GetValue (oElement) {
	if (oElement.type.substr(0,6) == "select") return oElement.options[oElement.selectedIndex].value;
	return oElement.value;
}
function UpdateDays (form, sOVN) {
	var numDays, nSelectedDay;
	if (eval ("form.day_"+sOVN+".type.substring(0,6)") == 'select') {
		eval ("nSelectedDay = form.day_"+sOVN+".options[form.day_"+sOVN+".selectedIndex].value;");
		//remove all options in select
		eval ("form.day_"+sOVN+".length = 0;");
		//add new options; one for each day
		eval ("numDays = NumDaysInMonth (form.month_"+sOVN+".options[form.month_"+sOVN+".selectedIndex].value, form.year_"+sOVN+".options[form.year_"+sOVN+".selectedIndex].value);");
		for (var i=1; i <= numDays; i++)
			eval ("form.day_"+sOVN+".options[i-1] = new Option(i.toString(), i.toString());");
		//default select
		eval ("form.day_"+sOVN+".options[(nSelectedDay-1 < numDays ? nSelectedDay-1 : numDays-1)].selected=true;");
	}
}
function NumDaysInMonth(nMonth, nYear) {    //note: nMonth will be 1 higher than it should be
	var nDate = new Date (nYear, nMonth-1, 1);
	for (var i=29; i < 33; i++) {
	    nDate.setDate (i);
	    if (nDate.getMonth() != nMonth-1) return i-1;
	}
	alert ("Javascript error: can't determine number of days for: "+ nMonth +"/"+ nYear +"!");
}
function AlertTest (s) {
	alert (s);
}