// ===================================================================
// Author: Matt Kruse <matt@mattkruse.com>
// WWW: http://www.mattkruse.com/
//
// NOTICE: You may use this code for any purpose, commercial or
// private, without any further permission from the author. You may
// remove this notice from your final code if you wish, however it is
// appreciated by the author if at least my web site address is kept.
//
// You may *NOT* re-distribute this code in any way except through its
// use. That means, you can include it in your product, or your web
// site, or any other form where the code is actually being used. You
// may not put the plain javascript up on your site for download or
// include it in your javascript libraries for download. 
// If you wish to share this code with others, please just point them
// to the URL instead.
// Please DO NOT link directly to my .js files from your site. Copy
// the files to your server and use them there. Thank you.
// ===================================================================


//Toji Abraham Mathew wrote this comment:
//i got the script file from http://www.mattkruse.com/javascript/date/ . u can also get a good live example there.
//this js file is to format datetime using javascript.
//eg: how to use
//formatDate(new Date(getDateFromFormat(<"here u need to set the date">,<"here u need to tell the format of the set date">)),<"here u need to set the output format of the date">)
//live eg : formatDate(new Date(getDateFromFormat("October 22 ,2007","MMM d ,y")),"EE MMM dd yyyy")
//    output : "Monday October 22 2007"




//The format string consists of the following abbreviations:

//Field        | Full Form          | Short Form
//-------------|--------------------|-----------------------
//Year         | yyyy (4 digits)    | yy (2 digits), y (2 or 4 digits)
//Month        | MMM (name or abbr.)| MM (2 digits), M (1 or 2 digits)
//             | NNN (abbr.)        |
//Day of Month | dd (2 digits)      | d (1 or 2 digits)
//Day of Week  | EE (name)          | E (abbr)
//Hour (1-12)  | hh (2 digits)      | h (1 or 2 digits)
//Hour (0-23)  | HH (2 digits)      | H (1 or 2 digits)
//Hour (0-11)  | KK (2 digits)      | K (1 or 2 digits)
//Hour (1-24)  | kk (2 digits)      | k (1 or 2 digits)
//Minute       | mm (2 digits)      | m (1 or 2 digits)
//Second       | ss (2 digits)      | s (1 or 2 digits)
//AM/PM        | a                  |

//NOTE THE DIFFERENCE BETWEEN MM and mm! Month=MM, not mm!

//Examples:
// "MMM d, y" matches: January 01, 2000
//                     Dec 1, 1900
//                     Nov 20, 00
// "M/d/yy"   matches: 01/20/00
//                     9/2/00
// "MMM dd, yyyy hh:mm:ssa" matches: "January 01, 2000 12:30:45AM"





var MONTH_NAMES=new Array('January','February','March','April','May','June','July','August','September','October','November','December','Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec');
var DAY_NAMES=new Array('Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sun','Mon','Tue','Wed','Thu','Fri','Sat');

function LZ(x){return(x<0||x>9?"":"0")+x}

function isDate(val,format){var date=getDateFromFormat(val,format);if(date==0){return false;}return true;}



function compareDates(date1,dateformat1,date2,dateformat2)
{
    var d1=getDateFromFormat(date1,dateformat1);
    var d2=getDateFromFormat(date2,dateformat2);
    
    if(d1==0 || d2==0)
        {return -1;}
    else if(d1 > d2)
        {return 1;}
        
    return 0;
}







function formatDate(date,format)
{
    format=format+"";
    var result="";
    var i_format=0;
    var c="";
    var token="";
    var y=date.getYear()+"";
    var M=date.getMonth()+1;
    var d=date.getDate();
    var E=date.getDay();
    var H=date.getHours();
    var m=date.getMinutes();
    var s=date.getSeconds();
    var yyyy,yy,MMM,MM,dd,hh,h,mm,ss,ampm,HH,H,KK,K,kk,k;
    var value=new Object();
    
    if(y.length < 4)
    {y=""+(y-0+1900);}
    
    value["y"]=""+y;
    value["yyyy"]=y;
    value["yy"]=y.substring(2,4);
    value["M"]=M;
    value["MM"]=LZ(M);
    value["MMM"]=MONTH_NAMES[M-1];
    value["NNN"]=MONTH_NAMES[M+11];
    value["d"]=d;
    value["dd"]=LZ(d);
    value["E"]=DAY_NAMES[E+7];
    value["EE"]=DAY_NAMES[E];
    value["H"]=H;
    value["HH"]=LZ(H);
    
    if(H==0)
    {
        value["h"]=12;
    }
    else if(H>12)
    {
        value["h"]=H-12;
    }
    else
    {
        value["h"]=H;
    }
    
    value["hh"]=LZ(value["h"]);
    
    if(H>11)
    {
        value["K"]=H-12;
    }
    else
    {
        value["K"]=H;
    }
    
    value["k"]=H+1;
    value["KK"]=LZ(value["K"]);
    value["kk"]=LZ(value["k"]);

    if(H > 11)
    {
        value["a"]="PM";
    }
    else
    {
        value["a"]="AM";
    }
        
    value["m"]=m;
    value["mm"]=LZ(m);
    value["s"]=s;
    value["ss"]=LZ(s);
    
    while(i_format < format.length)
    {
        c=format.charAt(i_format);token="";

        while((format.charAt(i_format)==c) &&(i_format < format.length))
        {
            token += format.charAt(i_format++);
        }
        
        if(value[token] != null)
        {
            result=result + value[token];
        }
        else
        {
            result=result + token;
        }
    }
    
    return result;
  }






function _isInteger(val)
{
    var digits="1234567890";
    for(var i=0;i < val.length;i++)
    {
        if(digits.indexOf(val.charAt(i))==-1)
        {
        return false;
        }
    }
    return true;
}






function _getInt(str,i,minlength,maxlength)
{
    for(var x=maxlength;x>=minlength;x--)
    {
        var token=str.substring(i,i+x);
        if(token.length < minlength)
        {
            return null;
        }
        
        if(_isInteger(token))
        {
        return token;
        }
    }
    
    return null;
}



function getDateFromFormat(val,format)
{
    val=val+"";
    format=format+"";
    var i_val=0;
    var i_format=0;
    var c="";
    var token="";
    var token2="";
    var x,y;
    var now=new Date();
    var year=now.getYear();
    var month=now.getMonth()+1;
    var date=1;
    var hh=now.getHours();
    var mm=now.getMinutes();
    var ss=now.getSeconds();
    var ampm="";
    
    while(i_format < format.length)
    {
        c=format.charAt(i_format);
        token="";
        
        while((format.charAt(i_format)==c) &&(i_format < format.length))
        {
            token += format.charAt(i_format++);
        }
        
        if(token=="yyyy" || token=="yy" || token=="y")
        {
            if(token=="yyyy")
            {x=4;y=4;}
            
            if(token=="yy")
            {x=2;y=2;}
            
            if(token=="y")
            {x=2;y=4;}
            
            year=_getInt(val,i_val,x,y);
            
            if(year==null)
            {return 0;}
            
            i_val += year.length;
            
            if(year.length==2)
            {
                if(year > 70)
                {year=1900+(year-0);}
                else
                {year=2000+(year-0);}
                
            }
        }
        else if(token=="MMM"||token=="NNN")
        {
            month=0;
            
            for(var i=0;i<MONTH_NAMES.length;i++)
            {
                var month_name=MONTH_NAMES[i];
                
                if(val.substring(i_val,i_val+month_name.length).toLowerCase()==month_name.toLowerCase())
                {
                    if(token=="MMM"||(token=="NNN"&&i>11))
                    {
                        month=i+1;
                        
                        if(month>12)
                        {month -= 12;}
                        
                        i_val += month_name.length;
                        break;
                    }
                }
            }
            
            if((month < 1)||(month>12))
            {return 0;}
        }
        else if(token=="EE"||token=="E")
        {
            for(var i=0;i<DAY_NAMES.length;i++)
            {
                var day_name=DAY_NAMES[i];
                
                if(val.substring(i_val,i_val+day_name.length).toLowerCase()==day_name.toLowerCase())
                {
                    i_val += day_name.length;
                    break;
                }
            }
        }
        else if(token=="MM"||token=="M")
        {
            month=_getInt(val,i_val,token.length,2);
            
            if(month==null||(month<1)||(month>12))
            {return 0;}
            
            i_val+=month.length;
        }
        else if(token=="dd"||token=="d")
        {
            date=_getInt(val,i_val,token.length,2);
            
            if(date==null||(date<1)||(date>31))
            {return 0;}
            
            i_val+=date.length;
        }
        else if(token=="hh"||token=="h")
        {
            hh=_getInt(val,i_val,token.length,2);
            
            if(hh==null||(hh<1)||(hh>12))
            {return 0;}
            
            i_val+=hh.length;
            
        }
        else if(token=="HH"||token=="H")
        {
            hh=_getInt(val,i_val,token.length,2);
            
            if(hh==null||(hh<0)||(hh>23))
            {return 0;}
            
            i_val+=hh.length;
        }
        else if(token=="KK"||token=="K")
        {
            hh=_getInt(val,i_val,token.length,2);
            
            if(hh==null||(hh<0)||(hh>11))
            {return 0;}
            
            i_val+=hh.length;
            
        }
        else if(token=="kk"||token=="k")
        {
            hh=_getInt(val,i_val,token.length,2);
            
            if(hh==null||(hh<1)||(hh>24))
            {return 0;}
            
            i_val+=hh.length;hh--;
            
        }
        else if(token=="mm"||token=="m")
        {
            mm=_getInt(val,i_val,token.length,2);
            
            if(mm==null||(mm<0)||(mm>59))
            {return 0;}
            
            i_val+=mm.length;
        }
        else if(token=="ss"||token=="s")
        {
            ss=_getInt(val,i_val,token.length,2);
            
            if(ss==null||(ss<0)||(ss>59))
            {return 0;}
            
            i_val+=ss.length;
            
        }
        else if(token=="a")
        {
            if(val.substring(i_val,i_val+2).toLowerCase()=="am")
            {ampm="AM";}
            else if(val.substring(i_val,i_val+2).toLowerCase()=="pm")
            {ampm="PM";}
            else
            {return 0;}
            
            i_val+=2;
            
        }
        else
        {
            if(val.substring(i_val,i_val+token.length)!=token)
            {return 0;}
            else
            {i_val+=token.length;}
        }
    }//End While
        
        
    if(i_val != val.length)
    {return 0;}
    
    if(month==2)
    {
        if( ((year%4==0)&&(year%100 != 0) ) ||(year%400==0) )
        {
            if(date > 29)
            {return 0;}
        }
        else
        {
            if(date > 28)
            {return 0;}
        }
    }
    
    if((month==4)||(month==6)||(month==9)||(month==11))
    {
        if(date > 30)
        {return 0;}
    }
    
    if(hh<12 && ampm=="PM")
    {
        hh=hh-0+12;
    }
    else if(hh>11 && ampm=="AM")
    {   
        hh-=12;
    }
    
    var newdate=new Date(year,month-1,date,hh,mm,ss);
    return newdate.getTime();
       
}







function parseDate(val)
{
    var preferEuro=(arguments.length==2)?arguments[1]:false;
    generalFormats=new Array('y-M-d','MMM d, y','MMM d,y','y-MMM-d','d-MMM-y','MMM d');
    monthFirst=new Array('M/d/y','M-d-y','M.d.y','MMM-d','M/d','M-d');
    dateFirst =new Array('d/M/y','d-M-y','d.M.y','d-MMM','d/M','d-M');
    var checkList=new Array('generalFormats',preferEuro?'dateFirst':'monthFirst',preferEuro?'monthFirst':'dateFirst');
    var d=null;
    
    for(var i=0;i<checkList.length;i++)
    {
        var l=window[checkList[i]];
        
        for(var j=0;j<l.length;j++)
        {
            d=getDateFromFormat(val,l[j]);
            
            if(d!=0)
            {return new Date(d);}
        }
    }
    
    return null;
}