var ns4=document.layers
var ie4=document.all
var ns6=document.getElementById&&!document.all
var i=1


function initializiere_drag(e){
	calendarobj1=ns6? document.getElementById("calendarbox1") : document.all.calendarbox1
	calendarobj2=ns6? document.getElementById("calendarbox2") : document.all.calendarbox2
	calendarobj3=ns6? document.getElementById("calendarbox3") : document.all.calendarbox3
	calendarobj4=ns6? document.getElementById("calendarbox4") : document.all.calendarbox4
	calendarobj5=ns6? document.getElementById("calendarbox5") : document.all.calendarbox5
	calendarobj6=ns6? document.getElementById("calendarbox6") : document.all.calendarbox6
	calendarobj7=ns6? document.getElementById("calendarbox7") : document.all.calendarbox7
	calendarobj8=ns6? document.getElementById("calendarbox8") : document.all.calendarbox8
	calendarobj9=ns6? document.getElementById("calendarbox9") : document.all.calendarbox9
	calendarobj10=ns6? document.getElementById("calendarbox10") : document.all.calendarbox10
	calendarobj11=ns6? document.getElementById("calendarbox11") : document.all.calendarbox11
	calendarobj12=ns6? document.getElementById("calendarbox12") : document.all.calendarbox12

	search_page1=ns6? document.getElementById("layer_event") : document.all.layer_event
	search_page2=ns6? document.getElementById("layer_venue") : document.all.layer_venue
	search_page3=ns6? document.getElementById("layer_city") : document.all.layer_city
	search_page4=ns6? document.getElementById("layer_composer") : document.all.layer_composer

	cal_obj1=ns6? document.getElementById("calendar_box1") : document.all.calendar_box1
	cal_obj2=ns6? document.getElementById("calendar_box2") : document.all.calendar_box2
	cal_obj3=ns6? document.getElementById("calendar_box3") : document.all.calendar_box3
	cal_obj4=ns6? document.getElementById("calendar_box4") : document.all.calendar_box4

}

document.onmousedown=initializiere_drag

function cal_plus() {
	if (i == 4) i=1
	else i = i+1
	cal_change()
}

function cal_minus() {
	if (i == 1) i=4
	else i = i-1
	cal_change()
}

function cal_change(){
	if (ie4||ns6) {

		if (i==1) cal_obj1.style.visibility="visible"
		else cal_obj1.style.visibility="hidden"

		if (i==2) cal_obj2.style.visibility="visible"
		else cal_obj2.style.visibility="hidden"

		if (i==3) cal_obj3.style.visibility="visible"
		else cal_obj3.style.visibility="hidden"

		if (i==4) cal_obj4.style.visibility="visible"
		else cal_obj4.style.visibility="hidden"

	}
}


function calendar_plus() {
	if (i == 12) i=1
	else i = i+1
	calendar_change()
}

function calendar_minus() {
	if (i == 1) i=12
	else i = i-1
	calendar_change()
}


function calendar_change(){
	if (ie4||ns6) {

		if (i==1) calendarobj1.style.visibility="visible"
		else calendarobj1.style.visibility="hidden"

		if (i==2) calendarobj2.style.visibility="visible"
		else calendarobj2.style.visibility="hidden"

		if (i==3) calendarobj3.style.visibility="visible"
		else calendarobj3.style.visibility="hidden"

		if (i==4) calendarobj4.style.visibility="visible"
		else calendarobj4.style.visibility="hidden"

		if (i==5) calendarobj5.style.visibility="visible"
		else calendarobj5.style.visibility="hidden"

		if (i==6) calendarobj6.style.visibility="visible"
		else calendarobj6.style.visibility="hidden"

		if (i==7) calendarobj7.style.visibility="visible"
		else calendarobj7.style.visibility="hidden"

		if (i==8) calendarobj8.style.visibility="visible"
		else calendarobj8.style.visibility="hidden"

		if (i==9) calendarobj9.style.visibility="visible"
		else calendarobj9.style.visibility="hidden"

		if (i==10) calendarobj10.style.visibility="visible"
		else calendarobj10.style.visibility="hidden"

		if (i==11) calendarobj11.style.visibility="visible"
		else calendarobj11.style.visibility="hidden"

		if (i==12) calendarobj12.style.visibility="visible"
		else calendarobj12.style.visibility="hidden"

	}
}


function set_search_page(p) {
	search_page1.style.visibility="hidden"
	search_page2.style.visibility="hidden"
	search_page3.style.visibility="hidden"
	search_page4.style.visibility="hidden"

	if (p==1) search_page1.style.visibility="visible"
	if (p==2) search_page2.style.visibility="visible"
	if (p==3) search_page3.style.visibility="visible"
	if (p==4) search_page4.style.visibility="visible"
}


function set_calendar_params(DayFrom, MonthFrom, DayTill, MonthTill) {
	$('slEventDayFrom').value = DayFrom;
	
	$('slEventMonthFrom').value = MonthFrom;
	
	document.event_calendar.submit();
}