var dtCh= ".";
var minYear=2006;
var maxYear=2006;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr,field){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strDay=dtStr.substring(0,pos1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		if (doc_lang=='fr_FR')
			alert("Veuillez entrer la date: JJ.MM.AAAA")
		else
			alert("Field: "+field+"\nPlease enter the date: dd.mm.yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		if (doc_lang=='fr_FR')
			alert("Veuillez entrer un mois valide")
		else
			alert("Field: "+field+"\nPlease enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		if (doc_lang=='fr_FR')
			alert("Veuillez entrer une date valide")
		else
			alert("Field: "+field+"\nPlease enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		if (doc_lang=='fr_FR')
			alert("Veuillez entrer une ann\xe9e valide \xe0 quatre chiffres : AAAA")
		else
			alert("Field: "+field+"\nPlease enter a valid four-digit year: yyyy")
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		if (doc_lang=='fr_FR')
			alert("Veuillez entrer la date: JJ.MM.AAAA")
		else
			alert("Field: "+field+"\nPlease enter the date: dd.mm.yyyy")
		return false
	}
return true
}

function validateSearch(form){
	form.submitti_0.disabled=true;
    var numSelected1 = 0;
    var numSelected2 = 0;
    var i;
    var submitAdv;

    
        for(i = 0; i < form.elements['u4.search.options.temp.templateType'].length; i++){
            if(form.elements['u4.search.options.temp.templateType'][i].selected){
                    numSelected1++;
            }
        }

        for(i = 0; i < form.elements['u4.search.options.Policy_Areas.keyword'].length; i++){
            if(form.elements['u4.search.options.Policy_Areas.keyword'][i].selected){
                    numSelected2++;
            }
        }

        if(numSelected1 == '0' && numSelected2 == '0'){
            document.searchForm.elements['u4.search.for'].value = form.elements['u4.search.for'].value;
            document.searchForm.submit();
        }
        else{
                form.submit();
        }
    
}

function ValidateForm(form){
	
	form.submit.disabled=true;
	
    var dt=form.startdatefield;
	if (dt.value!="" && dt.value!=null)
	{
		var field="From";
		if (isDate(dt.value,field)==false){
			dt.focus();
			form.submit.disabled=false;
			return false;
		}
	}
	
	var dt=form.enddatefield;
	if (dt.value!="" && dt.value!=null)
	{
		var field="To";
		if (isDate(dt.value,field)==false){
			dt.focus();
			form.submit.disabled=false;
			return false;
		}
	}
	if (form.elements[1].value=="Event_Types")
	{
		if ((form.searchfield.value=="" || form.searchfield.value==null) && (form.Event_Type.value=="" || form.Event_Type.value==null) && (form.Policy_Area.value=="" || form.Policy_Area.value==null) && (form.startdatefield.value=="" || form.startdatefield.value==null) && (form.enddatefield.value=="" || form.enddatefield.value==null))
		{
			if (doc_lang=='fr_FR')
				alert("Veuillez s\xe9lectionner le crit\xe8re de recherche ")
			else
				alert("Please select search criteria");
			form.submit.disabled=false;
			return false;
		}
	}
	else
	{
		if ((form.searchfield.value=="" || form.searchfield.value==null) && (form.templateType.value=="" || form.templateType.value==null) && (form.Policy_Area.value=="" || form.Policy_Area.value==null) && (form.startdatefield.value=="" || form.startdatefield.value==null) && (form.enddatefield.value=="" || form.enddatefield.value==null))
		{
			if (doc_lang=='fr_FR')
				alert("Veuillez s\xe9lectionner le crit\xe8re de recherche")
			else
				alert("Please select search criteria");
			form.submit.disabled=false;
			return false;
		}
	}
    return true;
 }