/* 
Performs field validation by looping through all available fields on the form.
Field classes to be used:
		required --> field cannot be empty
		numeric --> field must contain numeric values
*/

// This is the main function that needs to be called from the form.
function validateFields ( formName )
{
	var msg = "";
	var emptyFields = "";
	var numericFields = "";
	var noErrorList = "";
	var index = 0;
	possibleErrorList = new Object();
	
	for (var i = 0; i < formName.length; i++)
	{
		var e = formName.elements[i];
				
		// validate required field
	if (e.className.indexOf("required") != -1)
		{
			// validate radio and checkbox field
			if (e.type == "radio" || e.type == "checkbox")
			{
				if (e.checked == true)
				{
					noErrorList += e.title;
				}
				else
				{
					possibleErrorList[index++] = e.title;
				}
			}
			
			// validate other types of field
			emptyFields += checkRequiredField ( e );
		}
		
		// validate numeric field
		if (e.className.indexOf("numeric") != -1)
		{
			numericFields += checkNumericField ( e );
		}
	}

	// Find out which radio button and checkboxes are actually empty.
	// If the field's title isn't in noErrorList, add it to emptyFields variable.
	// Also add the field's title to noErrorList so the same title isn't added to emptyFields again and again.
	for (count in possibleErrorList)
	{
		if (noErrorList.indexOf (possibleErrorList[count]) == -1)
		{
			emptyFields += "\n" + possibleErrorList[count];
			noErrorList += possibleErrorList[count];
		}
	}
	
	// display msg
	if (!emptyFields && !numericFields)
	{
		return true
	}
	else
	{
		var strFieldTitle, strEmptyFieldTitle, strNumericFieldTitle;
		var intPos;
		
		strEmptyFieldTitle = "";
		strNumericFieldTitle = "";
		
		if (emptyFields)
		{
			intPos = emptyFields.indexOf("\n");
			strEmptyFieldTitle = intPos > -1 ? emptyFields.substr(0, intPos) : emptyFields.substr(0);

			msg += "The following information below cannot be empty: \n\n";
			msg += emptyFields + "\n\n";
		}
		if (numericFields)
		{
			intPos = numericFields.indexOf("\n");
			strNumericFieldTitle = intPos > -1 ? numericFields.substr(0, intPos) : numericFields.substr(0);
			
			msg += "The following information below can only accept number value:\n\n";
			msg += numericFields + "\n\n";
		}
		alert (msg);
	
		//Set the first field name that needs to be validated
		strFieldTitle = strEmptyFieldTitle != "" ? strEmptyFieldTitle : strNumericFieldTitle;
		
		for (var i = 0; i < formName.length; i++)
		{
			var e = formName.elements[i];
			if (e.title == strFieldTitle)
			{
				if (document.getElementById("tab"))		//----------------added by cynthia - function to focus on which tab 
				{
					if (e.className.charAt(8))
					{
						n=e.className.charAt(8) 	//m=String(parseInt(e.className.charAt(8))+1)
						//alert (n)
						if (n==1)
						{ShowHideTab('tab'+n,'tab'+String(parseInt(n)+1),'1')}
						else
						{ShowHideTab('tab'+n,'tab'+String(parseInt(n)-1),'2')}
					}
				}	//---------------------end of function to focus on which tab
			if (e.type != "hidden") { // added by zakiah - function not to focus on radio and checkbox type field
					e.focus()
				}
				break;
			}
		}
		return false;
	}
}

function checkRequiredField ( e )
{
	var emptyFields = "";
	
	if ( (e.type == "text" || e.type == "textarea") && (e.value == null || e.value == "") )
	{
		emptyFields += e.title + "\n";
	}
		
	if (e.type == "select-multiple" && e.selectedIndex == -1)
	{
		emptyFields += e.title + "\n";
	}
	
	//if (e.type == "select-one" && e.selectedIndex == 0)				previous got no checking on selected empty value
	if (e.type == "select-one" && e.selectedIndex == 0 && e.options[e.selectedIndex].text=="")	// modified by cynthia
	{
		emptyFields += e.title + "\n";
	}
	return emptyFields;
}

function checkNumericField ( e )
{
	var numericFields = "";
	
	if (e.type == "text" || e.type == "textarea")
	{
		if ( !isNumber (e.value) )
		{
			numericFields += e.title + "\n";
		}
	}
	return numericFields;
}

function isNumber ( num )
{
	decimalPoint = false;
	
	for (var i = 0; i < num.length; i++)
	{
		var oneChar = num.charAt ( i );
		if (oneChar < "0" || oneChar > "9")
		{
			if (i == 0 && oneChar == "-")
			{
				continue;
			}
			if (oneChar == "." && !decimalPoint)
			{
				decimalPoint = true;
				continue;
			}
			return false;
		}
	}
	return true;
}

function check_field_alert(field, str_Alert)
{
	var Flag_Select = "No"

	if (check_field(field))
	{
	Flag_Select = "Yes"
	}
	
	if (Flag_Select == "No")
	{
	field_alert(field, str_Alert)
	return false
	}
	else
	{
	return true
	}
}

function check_field(field)
{ 
	if (field.type == "text" || field.type == "textarea")
	{
		if (field.value != "")
		{
			return true
		}
	}
	else if (field.type == "select-one")
	{ 
		if (field.options.selectedIndex != 0)
		{
		return true
		}
	}
	else if (field.type == "select-multiple")
	{ 
		if (field.options.selectedIndex != -1)
		{
		return true
		}
	}
	else
	{ 
		for(i = 0; i<field.length; i++)
		{
		if (field[i].checked)
		{
		return true
		break
		}
		}
	}
}

function field_alert(field, str_Alert)
{

		if (str_Alert != "")
		{
		alert(str_Alert)
		if (field.type == "text" || field.type == "textarea" || field.type == "select-one")
		{
			field.focus()
		}
		}
		else if (field.type == "text" || field.type == "textarea" || field.type == "select-one")
		{
		alert(field.title + " cannot be empty.")
		field.focus()
		}
		else
		{
		alert("The following information cannot be empty.")
		}
}

function check_date(input_date,greater_than_today_flag)
{
	
  if (input_date != "")
   {
		var date_len = input_date.length;

		if (date_len > 10 || date_len < 10)
		{
			alert("Please insert again the date according to this format: \ndd/mm/yyyy  (E.g. 07/02/2003)");
			return false;
		}	
	
		if (Instr(input_date,"/") == -1) 
		{
			alert("Please insert again the date according to this format: \n contohnya 07/02/2003");
			return false;	
		}	
		day = parseInt(input_date.substring(0, 2),10);
	
		if (day > 31 || day <1)
		{		
			alert("Please check the day for the date.")
			//eval ("document.forms[0]." + fieldname + ".focus()")	
			return false;
		}
	
		mth = parseInt(input_date.substring(3, 5),10)
		if (mth < 1 || mth > 12)
		{	
			alert("Please check the month for the date.")
			return false;
		}
		
		if (greater_than_today_flag == "true") 
		{
			yr = parseInt(input_date.substring(6,10),10)	
	
			//Set the two dates
			today=new Date()
			var date1=new Date() 
			date1.setMonth(mth - 1) //Month is 0-11 in JavaScript
			date1.setFullYear(yr)
			date1.setDate(day)
		
			//Set 1 day in milliseconds
			//	var one_day=1000*60*60*24
			if (today.getTime() < date1.getTime()) 
			{
				alert("Please check again the date. \nDate cannot be previous date.")
				return false;
			}
		}	
	}	
 }