function check_date(field){

var checkstr = "0123456789";
var DateField = field;
var Datevalue = "";
var DateTemp = "";
var seperator = "-";
var day;
var month;
var year;
var leap = 0;
var err = 0;
var i;
   err = 0;
   DateValue = DateField.value;
   /* Delete all chars except 0..9 */
   for (i = 0; i < DateValue.length; i++) {
      if (checkstr.indexOf(DateValue.substr(i,1)) >= 0) {
         DateTemp = DateTemp + DateValue.substr(i,1);
      }
   }
   DateValue = DateTemp; // date value excluding seperators

   // accept only 8 charactered date 
   if (DateValue.length != 6) { 
		alert("Please enter date only in DD (any seperator) MM (any seperator) YY format");
		field.focus();
		field.select();
		return false;
   }
   /* Always change date to 8 digits - string*/
   /* if year is entered as 2-digit / always assume 20xx */
   if (DateValue.length == 6) {
		 YearVal=DateValue.substr(4,2);
//		 alert (YearVal);
         DateValue = DateValue.substr(0,4) + '20' + DateValue.substr(4,2); 
	}
   if (DateValue.length != 8) {
	   
      err = 19;}
   /* year is wrong if year = 0000 */
   year = DateValue.substr(4,4);
//   alert (year);
   if (year == 0) {
      err = 20;
   }
   /* Validation of month*/
   month = DateValue.substr(2,2);
   if ((month < 1) || (month > 12)) {
      err = 21;
   }
   /* Validation of day*/
   day = DateValue.substr(0,2);
   if (day < 1) {
     err = 22;
   }
   /* Validation leap-year / february / day */
   if ((year % 4 == 0) || (year % 100 == 0) || (year % 400 == 0)) {
      leap = 1;
   }
   if ((month == 2) && (leap == 1) && (day > 29)) {
      err = 23;
   }
   if ((month == 2) && (leap != 1) && (day > 28)) {
      err = 24;
   }
   /* Validation of other months */
   if ((day > 31) && ((month == "01") || (month == "03") || (month == "05") || (month == "07") || (month == "08") || (month == "10") || (month == "12"))) {
      err = 25;
   }
   if ((day > 30) && ((month == "04") || (month == "06") || (month == "09") || (month == "11"))) {
      err = 26;
   }
   /* if 00 ist entered, no error, deleting the entry */
   if ((day == 0) && (month == 0) && (year == 00)) {
      err = 0; day = ""; month = ""; year = ""; seperator = "";
   }

   /*If field is empty....*/
   if(DateValue=='')
       err=1;

   /* if no error, write the completed date to Input-Field (e.g. 13.12.2001) */
   
  if (err == 0) {
      DateField.value = day + seperator + month + seperator + YearVal;
      return true;
   }
   /* Error-message if err != 0 */
   else {
      alert("Incorrect Date: Please Enter the Date in Format 'DD-MM-YY'");
      DateField.select();
      DateField.focus();
      return false;
   }
}



function checkMail(email) {
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test(email)) {return true;}
	else {return false;}
}

function IsNumeric(fieldInfo) {
	var allowChars = "0123456789.";
	var IsNumeric=true;
	var Char;
	
	for (i = 0; i < fieldInfo.length && IsNumeric == true; i++) { 
		Char = fieldInfo.charAt(i); 
		if (allowChars.indexOf(Char) == -1) {
			IsNumeric = false;
		}
	}
	return IsNumeric;   
}

function addEvent( obj, type, fn ) {
	if (obj.addEventListener) {
		obj.addEventListener( type, fn, false );
		EventCache.add(obj, type, fn);
	}
	else if (obj.attachEvent) {
		obj["e"+type+fn] = fn;
		obj[type+fn] = function() { obj["e"+type+fn]( window.event ); }
		obj.attachEvent( "on"+type, obj[type+fn] );
		EventCache.add(obj, type, fn);
	}
	else {
		obj["on"+type] = obj["e"+type+fn];
	}
}

var EventCache = function(){
	var listEvents = [];
	return {
		listEvents : listEvents,
		add : function(node, sEventName, fHandler){
			listEvents.push(arguments);
		},
		flush : function(){
			var i, item;
			for(i = listEvents.length - 1; i >= 0; i = i - 1){
				item = listEvents[i];
				if(item[0].removeEventListener){
					item[0].removeEventListener(item[1], item[2], item[3]);
				};
				if(item[1].substring(0, 2) != "on"){
					item[1] = "on" + item[1];
				};
				if(item[0].detachEvent){
					item[0].detachEvent(item[1], item[2]);
				};
				item[0][item[1]] = null;
			};
		}
	};
}();
addEvent(window,'unload',EventCache.flush);

var stripe = function() {
  var tables = document.getElementsByTagName("table");  

  for(var x=0;x!=tables.length;x++){
    var table = tables[x];
	// if it isn't a table, or if it lacks a stripe class, skip it
	if (! table || document.getElementsByClassName("stripe")=="") { return; } 
	
    var tbodies = table.getElementsByTagName("tbody");
    
    for (var h = 0; h < tbodies.length; h++) {
		
	  var even = true;
      var trs = tbodies[h].getElementsByTagName("tr");
      
      for (var i = 0; i < trs.length; i++) {
        trs[i].onmouseover=function(){
          this.className += " ruled"; return false
        }
        trs[i].onmouseout=function(){
          this.className = this.className.replace("ruled", ""); return false
        }
        
        if(even)
          trs[i].className += " even";
        
        even = !even;
      }
    }
  }
}


function highlightInputs() {
	var inputs = document.getElementsByTagName('input');
	var i;
	for (i=0; i<inputs.length; i++) {
		inputs[i].onfocus = function() {
			this.style.background = '#F6F6F6';
		}
		inputs[i].onblur = function() {
			this.style.background = '#FFF';	
		}
	}
}

function showPrint() {
	if ($("invprintli")) {
		$("invprintli").style.display = "block";
	}
	
	// not the best place for this, but convenient enough for now
	if ($("private_note_form")) {
		$("private_note_form").style.display = "none"
	}
}

function requiredFields() {
	requiredFields = document.getElementsByClassName('requiredfield');
	validForm = 1;
	for (i=0; i<requiredFields.length; i++) {
		if (requiredFields[i].value == '') {
			validForm++;
			new Insertion.After (requiredFields[i].getAttribute('id'), ' <strong class="error">' + lang_field_required + '</strong>');
		}
	}
	if (validForm == 1) {
		return true;	
	} else {
		return false;
	}
}

function bamboo_init()
{
		if ($('invoice_status_menu'))
		{
			$('invoice_status_menu').style.display = "none";
		}
}

addEvent (window, "load", highlightInputs);
addEvent (window, "load", stripe);
addEvent (window, "load", showPrint);
addEvent (window, "load", bamboo_init);

function readMessage (el, effect) {
	Effect.toggle (el, 'appear', {duration:'0.4'});
}