// JavaScript Document
function to_amount(amount)
{
	if (isNaN(amount))
	{
		amount = 0;
	}
	var i = parseFloat(amount);
	if(isNaN(i)) { i = 0.00; }
	var minus = '';
	if(i < 0) { minus = '-'; }
	i = Math.abs(i);
	i = parseInt((i + .005) * 100);
	i = i / 100;
	s = new String(i);
	if(s.indexOf('.') < 0) { s += '.00'; }
	if(s.indexOf('.') == (s.length - 2)) { s += '0'; }
	s = minus + s;
	return s;
}

function to_num(data)
{
	i = 0;
	if(data.length > 0)
	{
	 var i = parseFloat(data);
	}
	return i;
}

function num_only(id)
{
	var field = document.getElementById(id);
	if(field.value.match(/[^0-9\.\-]/))field.value=field.value.replace(/[^0-9\.\-]/g,'');
}

// 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 check_date(dtStr){
	var data = new Array();
	result = true;
	var message = "";
	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){
		message += "The date format should be : dd/mm/yyyy\n\n";
		result = false;
	}
	if (strMonth.length<1 || month<1 || month>12){
		message +="Please enter a valid month at start/end date fields.\n\n";
		result = false;
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		message +="Please enter a valid day at start/end date fields.\n\n";
		result= false;
	}
	if (strYear.length != 4 || year==0){
		message +="Please enter a valid 4 digit year between "+minYear+" and "+maxYear+"\n\n";
		result = false;
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		message += "Please enter a valid date at start/end date fields.\n\n";
		result = false;
	}
	data = [result,message];
return data;
}
$(document).ready(function()
{

			// Dialog			

			$('#dialog').dialog({

				autoOpen: false,

				title:'TWD Accountants',

				modal:true,

				width: 450,

				buttons: {

					"Ok": function() { 

						$(this).dialog("close"); 

						$('#dialog').html(""); 

					}

				}

			});

		 

});