/*
 +-------------------------------------------------------------------+
 |                  J S - C H E C K F O R M   (v1.2)                 |
 |                                                                   |
 | Copyright Gerd Tentler               www.gerd-tentler.de/tools    |
 | Created: Oct. 23, 2001               Last modified: Jan. 24, 2006 |
 +-------------------------------------------------------------------+
 | This program may be used and hosted free of charge by anyone for  |
 | personal purpose as long as this copyright notice remains intact. |
 |                                                                   |
 | Obtain permission before selling the code for this program or     |
 | hosting this software on a commercial website or redistributing   |
 | this software over the Internet or in any other medium. In all    |
 | cases copyright must remain intact.                               |
 +-------------------------------------------------------------------+

======================================================================================================

 ARGUMENTS:

  - form-name or -number
  - 'field:title:type:minimum length'[, ...]  (type = number / mail / url / date(format)/compare(field2)/range(greaterthan|lessthan) / [none])


 Example:

 checkForm('frm1', 'name:::2', 'age::number:1', 'eMail:e-mail:mail:1', 'homepage::url:0',
           'birthday::date(dmy):1');

//////////////////////////////////////////////////////////////////
Additional changes made by Brijesh:

 checkForm('frm1','field::range(0|2):1')  for range between 0 and 2
 checkForm('frm1','field1::comp(field2):1') for comparing  between field1 and field2
 checkForm('Form1','ddl:name:list:1');min selected index should be 1;
now contains css styled notifications
///////////////////////////////////////////////////////////////////
------------------------------------------------------------------------------------------------------
 This script was tested with the following systems and browsers:

 - Windows XP: IE 6, NN 7, Opera 7, Firefox 1
 - Mac OS X:   IE 5, Safari 1

 If you use another browser or system, this script may not work for you - sorry.

 NOTE: Safari 1 on Mac OS X does only accept dates between Jan. 1, 1901 and Dec. 31, 2037 as valid.
======================================================================================================
*/
//--------------------------------------------------------------------------------------------------------
// Language settings
//--------------------------------------------------------------------------------------------------------

var msgNumber  = "must be a number";
var msgEMail   = "must be an e-mail address";
var msgURL     = "must be a web address";
var msgDate    = "must be a date";
var msgFillOut = "Please fill out";
var msgNoForm  = "Form does not exist";
var msgNoField = "Field does not exist";
var msgcomp  = "Password does not match";
var msgrange  = "Values are out of range for";
var msgddl="Please select ";


//--------------------------------------------------------------------------------------------------------
// Functions
//--------------------------------------------------------------------------------------------------------

function _trim(str) {
  if(str) {
    str = str.replace(/^\s+/, "");
    str = str.replace(/\s+$/, "");
  }
  return str;
}

function _isDate(year, month, day) {
  month--;
  if(year < 100) year += 2000;
  var d = new Date(year, month, day);
  return ((day == d.getDate()) && (month == d.getMonth()) && (year == d.getFullYear()));
}

function checkForm() {
  var args = checkForm.arguments;
  var f = args[0];
  var msg = "";
  var arr, field, title, type, minLength, elem, val, cnt, i, j;
  var format, d, day, month, year;

  var valid_url = /^(https?|ftp):\/\/([a-z0-9._-]+:[a-z0-9._-]+@)?[a-z0-9äöüÄÖÜ#._\/~% -]+(\?([a-z0-9_-]+(=[a-zA-Z0-99äöüÄÖÜß+%?_-]+&?)?)*)?$/i;
 
  var valid_mail =/^[-_a-zA-Z0-9][-_.a-zA-Z0-9]*@[-_.a-zA-Z0-9]+(\.[-_.a-zA-Z0-9]+)*$/;;

  if(document.forms[f]) 
  {
    for(i = 1; i < args.length; i++) 
    {
      arr = args[i].split(":");
      field = _trim(arr[0]);
      title = _trim(arr[1]);
      if(!title) title = field;
      type = _trim(arr[2].toLowerCase());
      minLength = _trim(arr[3]);
      elem = document.forms[f].elements[field];
      elem.style.backgroundColor="#ffffff";

      if(elem) 
      {
        val = _trim(elem.value);

        if(val != "") 
        {
          if(type == "number") 
          {
            val = val.replace(",", ".");
            if(isNaN(val)) 
				{
				msg += '"' + title + '" ' + msgNumber + "\n";
				elem.style.backgroundColor="#ffffcc";
				}
          }
          else if(type == "mail" && val.search(valid_mail) == -1) 
			{
			msg += '"' + title + '" ' + msgEMail + "\n";
			elem.style.backgroundColor="#ffffcc";
			}
          else if(type == "url" && val.search(valid_url) == -1)
			{
			 msg += '"' + title + '" ' + msgURL + "\n";
			 elem.style.backgroundColor="#ffffcc";
			}
		  else if(type.indexOf("date") != -1)
           {
            if(type.indexOf("(") != -1) format = type.substr(type.indexOf("("));
            else format = "(dmy)";
            d = val;

            for(j = 1; j < format.length - 1; j++) 
            {
              cnt = d.search(/[^0-9]/);
              if(cnt == -1) cnt = d.length;

              switch(format.charAt(j)) 
              {
                case "d": day = parseInt(d.substr(0, cnt)); d = d.substr(cnt + 1); break;
                case "m": month = parseInt(d.substr(0, cnt)); d = d.substr(cnt + 1); break;
                case "y": year = parseInt(d.substr(0, cnt)); d = d.substr(cnt + 1); break;
              }
            }
  
            if(!_isDate(year, month, day)) 
            {
				msg += '"' + title + '" ' + msgDate + "\n";
				elem.style.backgroundColor="#ffffcc";
			}
          }
          else if(type.indexOf("comp") != -1)
          {
          
            var start = type.indexOf("(");
			var end = type.indexOf(")");
			var field2=type.substring(start+1,end);
			var elem2 = document.forms[f].elements[field2];
			elem2.style.backgroundColor="#ffffff";
			var cpwd = elem2.value;
			if(cpwd != val)
				{
				msg +=  msgcomp + "\n";
				elem2.style.backgroundColor="#ffffcc";
				}
  
          }
          else if(type.indexOf("range") != -1)
          {
          
            var start = type.indexOf("(");
            var mid = type.indexOf("|");
            
			var end = type.indexOf(")");
			var val1=type.substring(start+1,mid);
			var val2=type.substring(mid+1,end);
			
			;
			if(val<val1 || val > val2)
			{
				msg +=  msgrange + " " + title + "\n";
				elem.style.backgroundColor="#ffffcc";
			}
  
          }
          else if(type=="list")
          {
        
          if(elem.selectedIndex<minLength)
          {
			 msg +=  msgddl + " " + title + "\n";
			 elem.style.backgroundColor="#ffffcc";
          }
          }
          
          
        
        }

        if(minLength) 
        {
          if(elem.length) 
          {
            if(elem.options) 
            {
              for(j = cnt = 0; j < elem.options.length; j++) 
              {
                if(elem.options[j].selected && elem.options[j].value != "") cnt++;
              }
           }
           else for(j = cnt = 0; j < elem.length; j++) 
            {
              if(elem[j].checked) cnt++;
            }
          }
          else if(elem.type == "checkbox") cnt = elem.checked ? 1 : 0;
          else cnt = val.length;
          if(cnt < minLength && type!="list") 
			{
			msg += msgFillOut + ' "' + title + '"\n';
			elem.style.backgroundColor="#ffffcc";
			}
        }
      }
      else msg += msgNoField + ': "' + field + '"\n';
    }

    if(msg) 
    { alert(msg);
    return false;
    }
    else 
    {
    
     return true;
     
     }
  }
  else alert(msgNoForm + ': "' + f + '"');
}

//--------------------------------------------------------------------------------------------------------