var ie, ns, ns6, fShow, fDisable, docW, dd_, x, y, dd_out, rightX, leftX, topY, downY;
var flag = false;
var is_loaded=true;
var timerID=null;

var dd_number=10;
var dd_names;
var dd_names = new Array();


var initialize_called = false;
function js_initialize()
{
   
	if (initialize_called) return 0;
	initialize_called = true;
	
	// check for browser version
	if (document.all) {ns=0;ie=1;ns6=0;fShow="visible";fDisable="hidden";}//IE
	else if (document.getElementById){ns=0;ie=0;ns6=1;fShow="visible";fDisable="hidden";}//NS6
	else if (document.layers) {ns=1;ie=0;ns6=0;fShow="show";fDisable="hide";}//NS4

	if (ns){
		document.onmouseup=hide_all;
		window.captureEvents(Event.MOUSEMOVE);
		window.onmousemove=check_if_open;
	}
	else {
		self.document.onclick = hide_all;
		document.body.onmousemove=check_if_open;
	}


}


function layer_on(name,caller_obj){
	hide_all();
	if (ie){
		document.all[name].style.visibility = fShow;
	}
	if (ns){
		offset=caller_obj.left;
		docW = 0;
		document.layers[name].left = docW + offset - 8;
		document.layers[name].visibility =fShow;
	}
	if (ns6) {
                offset=caller_obj.style.top
		docW = 0;
		var dim = document.getElementById(name).style.left= docW + offset - 6;
		document.getElementById(name).style.visibility = fShow;
	}
}


function check_if_open(e){
	if (ie) {
		var x = window.event.clientX;
		var y = window.event.clientY;
	}
	else{
		var x = e.pageX;
		var y = e.pageY;
	}
	if (y < 110 || y>260) hide_all();
}

function hide_all(){
	for (i=0;i < dd_names.length;i++) 
		if ((! ( dd_names[i].match(/js_layer/)))   ) layer_off(dd_names[i]);
}

function layer_off(name) 
{

		if (ns) document.layers[name].visibility = fDisable;
		else if (ie) document.all[name].style.visibility = fDisable;
		else if (ns6) {
			document.getElementById(name).style.visibility = fDisable;
		}
		return false;
}




	//-----------------------------------------------------------------------
	//function is called onchange of date-inputfields
	function checkSearchDates (date1name, date2name) {

          date1 = formatDateString(document.getElementById(date1name).value);
	  date2 = formatDateString(document.getElementById(date2name).value);	  
          if (date1 != document.getElementById(date1name).value) {
            document.getElementById(date1name).value = date1;
          }
          if (date2 != document.getElementById(date2name).value) {
            document.getElementById(date2name).value = date2;
          }
          

          var statusMessage = "";
	  if ( !isDate(date1) ) {
            statusMessage = "Das Start-Datum ihrer Suche ist ungültig.";
	  } else if ( !isDate(date2) ) {
            statusMessage = "Das End-Datum ihrer Suche ist ungültig.";
	  } else if ( !isDateSpan(date1,date2) ) {
            statusMessage = "Die angegebene Zeitspanne ist ungueltig.";
	  }

          if (statusMessage == "") {
            return true;
          } else {          
            alert(statusMessage);
            return false;
          }
	}


	//-----------------------------------------------------------------------
	//formats a given String into dd.mm.yyyy and returns it
	function formatDateString(dateString) {	
	
          //get current date to amend date if needed		
          var today = new Date();

          //see if each part of the dateString is formatted correctly and change it
          //when needed	
          var datePart = dateString.split(".");				
          var dayDate = checkDay(datePart[0], today);
          var monthDate = checkMonth(datePart[1], today);
          var yearDate = checkYear(datePart[2], today);
		
          //return datestring
          return dayDate + "." + monthDate + "." + yearDate;
	}


	//-----------------------------------------------------------------------
	//returns datePart correctly formatted
        function checkDay (datePart, today) {
          var dayDate = today.getDate();
  	  if ((datePart) && (datePart != "") && ((datePart.length == 1) || (datePart.length == 2)) && (datePart > 0) && (datePart < 32)) {
  	    if (datePart.length == 1) {
  	      datePart = "0" + datePart;
  	    }
  	    return datePart;
          } else {
  	    return dayDate;
  	  }
        }

        
	//-----------------------------------------------------------------------
        //returns datePart correctly formatted
	function checkMonth (datePart, today) {
  	  var monthDate = today.getMonth();
  	  if ((datePart) && (datePart != "") && ((datePart.length == 1) || (datePart.length == 2)) && (datePart > 0) && (datePart < 13)) {
  	    if (datePart.length == 1) {
  	      datePart = "0" + datePart;
  	    }
            return datePart;
  	  } else {
  	    return monthDate + 1;
  	  }
        }

        
        //-----------------------------------------------------------------------
        //returns year correctly
        function removeYearBug (year) {
          if (year < 1000) {
           year += 1900;
          }
          
          return year;
        }        
        
        //-----------------------------------------------------------------------
        //returns datePart correctly formatted
        function checkYear (datePart, today) {
          var yearDate = today.getYear();
          yearDate = removeYearBug(yearDate);
          var yearString = yearDate.toString();
  	  if ((datePart) && (datePart != "") && ((datePart.length == 2) || (datePart.length == 4)) ) {
  	    if (datePart.length == 2) {  		  
  	      datePart = yearString.substr(0,2) + datePart;
  	    }
  	    return datePart;
  	  } else {
  	    return yearDate;
  	  }
        }

        
	//-----------------------------------------------------------------------
	//examine if given string (dd.mm.yyyy) is also logically a date
	//returns true on success
	function isDate (dateString) {	  
	  var datePart = dateString.split(".");				
	  var dayDate = datePart[0] - 0;
	  var monthDate = datePart[1] - 1;
	  var yearDate = datePart[2] - 0;
		
          var testDate = new Date(yearDate,monthDate,dayDate);
          if ((removeYearBug(testDate.getYear()) == yearDate) && (testDate.getMonth() == monthDate) && (testDate.getDate() == dayDate)) {
            return true;
          } else {
            return false;
          }
	}

	
	//-----------------------------------------------------------------------
	//examine if given strings (dd.mm.yyyy) define correctly a datespan
	//returns true on success
	function isDateSpan (date1String, date2String) {	  
          var date1Part = date1String.split(".");
	  var date2Part = date2String.split(".");
	  var startDate = new Date(date1Part[2] - 0, date1Part[1] - 1, date1Part[0] - 0);
	  var endDate = new Date(date2Part[2] - 0, date2Part[1] - 1, date2Part[0] - 0);		
          if (startDate <= endDate) {    
            return true;
          } else {
            return false;
          }
        }