var dtCh="/";var minYear=1900;var maxYear=2100;
function isInteger(s){var i;for(i=0;i<s.length;i++){var c=s.charAt(i);if(((c<"0")||(c>"9")))return false;}return true;}
function stripCharsInBag(s,bag){var i;var 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){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,fname){var todaydate=new Date();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){alert("The date format should be : DD/MM/YYYY");document.getElementById(fname).value="DD/MM/YYYY";return false}if(strMonth.length<1||month<1||month>12){if(isNaN(month)){alert("The date format should be : DD/MM/YYYY");document.getElementById(fname).focus();}else{alert("Please enter a valid month");document.getElementById(fname).focus();}return false}if(strDay.length<1||day<1||day>31||(month==2&&day>daysInFebruary(year))||day>daysInMonth[month]){alert("Please enter a valid day");document.getElementById(fname).focus();return false}if(strYear.length!=4||year==0||year<minYear||year>maxYear){alert("Please enter a valid 4 digit year from "+todaydate.getYear());document.getElementById(fname).focus();return false}if(dtStr.indexOf(dtCh,pos2+1)!=-1||isInteger(stripCharsInBag(dtStr,dtCh))==false){alert("Please enter a valid date");document.getElementById(fname).focus();return false}return true}
function ValidateForm(id,fname){if(isDate(id,fname)==false){document.getElementById(fname).focus();document.getElementById(fname).value="DD/MM/YYYY";return false}return true}
function getDateObj_CurrentDate(){var input=new Date();var dayfield=input.getDate();var monthfield=input.getMonth();var yearfield=input.getFullYear();var months=new Array("0","1","2","3","4","5","6","7","8","9","10","11");switch(monthfield){case 0:monthfield="01";break;case 1:monthfield="02";break;case 2:monthfield="03";break;case 3:monthfield="04";break;case 4:monthfield="05";break;case 5:monthfield="06";break;case 6:monthfield="07";break;case 7:monthfield="08";break;case 8:monthfield="09";break;case 9:monthfield="10";break;case 10:monthfield="11";break;case 11:monthfield="12";break;}switch(dayfield){case 1:dayfield="01";break;case 2:dayfield="02";break;case 3:dayfield="03";break;case 4:dayfield="04";break;case 5:dayfield="05";break;case 6:dayfield="06";break;case 7:dayfield="07";break;case 8:dayfield="08";break;case 9:dayfield="09";break;}var dayobj=dayfield+"/"+monthfield+"/"+yearfield;return dayobj;}
function daysBetween(date1,date2){if(date1.indexOf("-")!=-1){date1=date1.split("-");}else if(date1.indexOf("/")!=-1){date1=date1.split("/");}else{return 0;}if(date2.indexOf("-")!=-1){date2=date2.split("-");}else if(date2.indexOf("/")!=-1){date2=date2.split("/");}else{return 0;}if(parseInt(date1[1],10)>=1000){var sDate=new Date(date1[1]+"/"+date1[0]+"/"+date1[2]);}else if(parseInt(date1[2],10)>=1000){var sDate=new Date(date1[2]+"/"+date1[1]+"/"+date1[0]);}else{return 0;}if(parseInt(date2[1],10)>=1000){var eDate=new Date(date2[1]+"/"+date2[0]+"/"+date2[2]);}else if(parseInt(date2[2],10)>=1000){var eDate=new Date(date2[2]+"/"+date2[1]+"/"+date2[0]);}else{return 0;}var one_day=1000*60*60*24;var daysApart=Math.abs(Math.ceil((sDate.getTime()-eDate.getTime())/one_day));return daysApart;}
function minMaxDaysValueFunction(text1,text2,textfieldname){var feild1=ValidateForm(document.getElementById(text1).value,text1);var feild2=ValidateForm(document.getElementById(text2).value,text2);if((feild1==true)&&(feild2==true)){document.getElementById(textfieldname).value=daysBetween(document.getElementById(text1).value,document.getElementById(text2).value);}}
function changeDefaultValue(text1,text2,text3,text4){document.getElementById(text1).value="DD/MM/YYYY";document.getElementById(text2).value="DD/MM/YYYY";document.getElementById(text3).value="";document.getElementById(text4).value="";resetDates();}