/* FORM FIELDS SUMBIT CHECKER
© 2006 Analytic Soft, www.analytic.com.ua
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Description

STEP1. First form fileds should be registered.
registerFieldChecking([field_name], [check_type], [message], [param1], [param2])
!!!One field CAN be registered twice or more with different value of [check_type]

STEP2. When user submits form we call testFormBeforeSubmit()
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FUNCTION registerFieldChecking([field_name], [check_type], [message], [param1], [param2])
PARAMETERS:
1. [field_name]: input, textarea, checkbox, radiobutton tag attribute NAME
2. [check_type]:
'NOT_EMPTY'  - checks field for not empty.
'MIN_LENGTH' - checks field for minimal length. [param1] is the minimal allowed length.
'MAX_LENGTH' - checks field for minimal length. [param1] is the maximal allowed length.
'EMAIL'      - checks field to be email.
'REGEXP'     - checks field with regexp.
3. [message] - message for alert.
4. [param2]  - reserved.

EXAMPLES:
      registerFieldChecking('NameTxt', 'NOT_EMPTY','??? ??? ?? ?????? ?????','','');
	  registerFieldChecking('NameTxt', 'MIN_LENGTH','??? ???? ?? ???????? ???????? ??? ???????? ??????','3','');

*/
     var checkedFormFields= new Array();
	 function registerFieldChecking(field_name, check_type, message, param1, param2)
	 {
      if (!document.getElementsByName(field_name)[0]) return false;
      if (checkedFormFields[field_name]==null) {checkedFormFields[field_name] = new Array();}
	  checkedFormFields[field_name][check_type] = new Array();
	  checkedFormFields[field_name][check_type]["field_name"]	=field_name;
	  checkedFormFields[field_name][check_type]["message"]		=message;
	  checkedFormFields[field_name][check_type]["param1"]		=param1;
	  checkedFormFields[field_name][check_type]["param2"]		=param2;
	  checkedFormFields[field_name][check_type]["object"]		=document.getElementsByName(field_name)[0];
	  checkedFormFields[field_name][check_type]["param2"]		=param2;

	 }
/*
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FUNCTION testFormBeforeSubmit()
Checks all registered fields

*/
	 function testFormBeforeSubmit()
	 {
	  var field;
	  for (field in checkedFormFields)
	  {
	    if (!checkField(field)) return false;
	  }
	  return true;
	 }
/*
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FUNCTION checkField([field_name])
Checks one field for field with tag attribute NAME=[field_name].
Fuction sets focus to tested field

*/

	 function checkField(field_name)
	 {
	  var check_type;             
	  for (check_type in checkedFormFields[field_name])
	  {
	    if (checkedFormFields[field_name][check_type]["object"]) checkedFormFields[field_name][check_type]["object"].focus();
		switch (check_type)
		{
		 case "NOT_EMPTY":
			if (checkedFormFields[field_name][check_type]["object"].value=='')
			{
			 alert(checkedFormFields[field_name][check_type]["message"]);
			 return false;
			}
		  break;

		 case "MIN_LENGTH":
			if (checkedFormFields[field_name][check_type]["object"].value.length<checkedFormFields[field_name][check_type]["param1"])
			{
			 alert(checkedFormFields[field_name][check_type]["message"]);
			 return false;
			}
		  break;
		 case "MAX_LENGTH":
			if (checkedFormFields[field_name][check_type]["object"].value.length>checkedFormFields[field_name][check_type]["param1"])
			{
			 alert(checkedFormFields[field_name][check_type]["message"]);
			 return false;
			}
		  break;
		 case "EMAIL":
			var email_exp=new RegExp("^[a-z0-9_-]{1,20}@(([a-z0-9-]+\.)+(com|net|org|mil|edu|gov|arpa|info|biz|inc|name|[a-z]{2})|[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})$");
			if (!checkedFormFields[field_name][check_type]["object"].value.match(email_exp))
			{
			 alert(checkedFormFields[field_name][check_type]["message"]);
			 return false;
			}
		  break;
		 case "REGEXP":
			var email_exp=new RegExp(checkedFormFields[field_name][check_type]["param1"]);
			if (!checkedFormFields[field_name][check_type]["object"].value.match(email_exp))
			{
			 alert(checkedFormFields[field_name][check_type]["message"]);
			 return false;
			}
		  break;
		 case "GROUP_NOT_EMPTY":
			var field_in_group, field_name_in_group;


			for(field_name_in_group in checkedFormFields[field_name][check_type]["param1"])
			{
				field_in_group = document.getElementsByName(checkedFormFields[field_name][check_type]["param1"][field_name_in_group])[0];

				if (!field_in_group) break;
               if ((field_in_group.type.toLowerCase() == 'checkbox') && field_in_group.checked) return true; //Checked
				if ((field_in_group.type.toLowerCase() != 'checkbox') && (field_in_group.value != '')) return true; //Filled
			}
			 alert(checkedFormFields[field_name][check_type]["message"]);
			 return false;

		  break;
		}
       }
		return true;
	 }
/* Download block click handler
© 2007 Analytic Soft, www.analytic.com.ua
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*/
function downloadClick(url)
{
	var DownloadFormWindow;
	DownloadFormWindow = window.open(url,'DownloadFormWindowName', 'Height=500, Width=600, scrollbars, alwaysRaised');
	DownloadFormWindow.focus( );
	return false;
}