// Declaring valid date character, minimum year and maximum year
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

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){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=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){
		alert("The date format should be : mm/dd/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
	return true;
}

	function validate_news(theForm){
		
		if(!empty(theForm.vchChamberNewsTitle,"News Title")){
			return false;
		}
		if(emptyonly(theForm.vchFile) && emptyonly(theForm.vchImage)){
			alert("Please upload either image or file");
			return false;
		}
		if(theForm.date_mm.value==''){
			alert("Please enter valid date");
			return false;
		}
		if(theForm.date_dd.value==''){
			alert("Please enter valid date");
			return false;
		}
		if(theForm.date_yy.value==''){
			alert("Please enter valid date");
			return false;
		}
		return true;
	}

	function edit_me(id){	
		document.edit_form.cimgid.value = id;
		document.edit_form.submit();
	}
	function change_me(id,actdct){	
	if(actdct=='D'){
		var agree=confirm("Are you sure you want to Activate this news?");
	}
	else{
		var agree=confirm("Are you sure you want to Deactivate this news?");
	}
	if(agree){
		document.change_form.cimgid.value = id;
		document.change_form.status.value = actdct;
		document.change_form.submit();
	}
	}
	function delete_me(id){
		var agree=confirm("Are you sure you want to delete this Image?");
		if(agree){		
			document.delete_form.cimgid.value = id;
			document.delete_form.submit();
		}
	}

	function delete_newsletter(id){
	var dodel = confirm("Are you sure you want to delete this Newsletter?");
	if(dodel){
		document.del_nl.cletterid.value = id;
		document.del_nl.submit();
	}
	}
	function resend_newsletter(id){
		document.send_nl.cletterid.value = id;
		document.send_nl.submit();
	}
	function edit_newsletter(id){
		document.edit_nl.cletterid.value = id;
		document.edit_nl.submit();
	}
	function deleteimg(type,id){
		var con;
		if(type=='i'){
			con=confirm("Are you sure you want to delete this Image?");
			if(con){
				//document.delimage.submit();
				location.href="add-chamber-news.php?mode=delimg&cnewsid="+id
			}
		}
		if(type=='f'){
			con=confirm("Are you sure you want to delete this File?");
			if(con){
				//document.delimage.submit();
				location.href="add-chamber-news.php?mode=delfile&cnewsid="+id
			}
		}
	}

function checkloginform(theForm){
		
	if(!empty(theForm.userName,"Username")){
		return false;
	}
	if(!empty(theForm.password,"Password")){
		return false;
	}
}