/* shared-functions.js */

  var Spanish=false;
  var txtMessage="";

  function IsBlank(value)
    {
      if (value.length == 0) return true;
      for (var i = 0; i <= value.length-1; i++) if (value.charAt(i) != " ") return false;
      return true;  
    }
  
  function IsNumeric(value)
    {
      //Make sure it's not Blank
      if (!IsBlank(value))
        {
          //Look for Multiple Periods
          var i = value.indexOf(".");
          if (i!=-1) if (value.indexOf(".",i+1)!=-1) return false;
          //Look for invalid characters
          // 12/22/2003 (9/30/2004) - consider commas "," as valid
          for (i=0; i<=value.length-1; i++)  if("0123456789.-,".indexOf(value.charAt(i))==-1) return false;
          //It's Good
          return true;
        }
      return false;
    }

  function RemoveCommas(value)	// function written 12/23/2003, modified version MTP October 2004
  	{
	var temp2 = "";
    	var Done = false;
    	var Max = value.length-1;
    	for (var i=0; i<Max; i++) 
      	{
          	if ((" 0".indexOf(value.charAt(i))==-1)||Done) 
            		{  
              		if("0123456789.-".indexOf(value.charAt(i))!=-1)
					{
					temp2 = temp2 + value.charAt(i);
					}
             		Done=true;
            		}
        	}
    	temp2 = temp2 + value.charAt(Max);
	value = temp2;
     return value;
	}
  
  function IsNonNegative(value)
    {
      if (!IsNumeric(value)) return false;
      if (parseFloat(value)>=0.0) return true;
      return false;
    }
    
  function IsNonZero(value)
    {
      if (!IsNumeric(value)) return false;
      if (parseFloat(value)==0) return false;
      return true;
    }
    
  function IsPositive(value)
    {
      if (!IsNumeric(value)) return false;
      if (parseFloat(value)>0.0) return true;
      return false;
    }

  function ValidateCurrency(field)
    {
      var temp = "";
      var temp2 = "";
      var Done = false;
      var Max = field.value.length-1;
      for (var i=0; i<Max; i++) 
        {
          if ((" 0".indexOf(field.value.charAt(i))==-1)||Done) 
            {  
              temp=temp+field.value.charAt(i);
              Done=true;
            }
        }
      temp = temp + field.value.charAt(Max);
      if (IsNumeric(temp)) 
        {
          // At this point, call a function to removes commas, if they exist
	     temp2 = RemoveCommas(temp);
          field.value = FormatCurrency(parseInt(temp2)); //Truncates !
          return true;
        }
      else 
        {
          if (Spanish) {
          	txtMessage = "Por favor inserte una cantidad en D\u00F3lares en este espacio.";
          }
          else {
          	txtMessage = "Please enter a Dollar amount for this field.";
          }
          alert(txtMessage);
          SetFocus(field);
          return false;
        }
    }  

  function ValidateInteger(field)
    {
      var temp = "";
      var Done = false;
      var Max = field.value.length-1;
      for (var i=0; i<Max; i++) 
        {
          if ((" 0".indexOf(field.value.charAt(i))==-1)||Done) 
            {  
              temp=temp+field.value.charAt(i);
              Done=true;
            }
        }
      temp = temp + field.value.charAt(Max);
      if (IsNumeric(temp)) 
        {
          field.value = parseInt(temp);//Truncates !
          return true;
        }
      else 
        {
          if (Spanish) {
          	txtMessage = "Por favor inserte un n\u00FAmero entero en este espacio.";
          }
          else {
          	txtMessage = "Please enter a whole number for this field.";
          }
          alert(txtMessage);
          SetFocus(field);
          return false;
        }
    }

  function FormatCurrency(amount)
    {
      var temp = "" + Math.round(100*amount);
      while (temp.length <= 2) temp = "0" + temp;
      var DecPlace = temp.length-2; 
      return temp.substring(0,DecPlace) + "." + temp.substring(DecPlace, temp.length);
    }

  function ValidateDate(dateStr) {
    // Date validation function courtesty of Sandeep V. Tamhankar (stamhankar@hotmail.com)
    
    var datePat = /^(\d{1,2})(\/|-)(\d{1,2})\2(\d{4})$/; // requires 4 digit year
    var matchArray = dateStr.value.match(datePat); // is the format ok?
    if (matchArray == null || dateStr.value==""){
      if (Spanish) {
      	txtMessage = "Por favor inserte el d\u00EDa de nacimiento en el formato de MM/DD/YYYY.";
      }
      else {
      	txtMessage = "Please enter student's date of birth in MM/DD/YYYY format.";
      }
      alert(txtMessage);
      SetFocus(dateStr);
      return false;
    }
    month = matchArray[1]; // parse date into variables
    day = matchArray[3];
    year = matchArray[4];
    if (month < 1 || month > 12) { // check month range
      if (Spanish) {
       	txtMessage = "Los meses deben ser entre el 1 y el 12.";
      }
      else {
      	txtMessage = "Month must be between 1 and 12.";
      }
      alert(txtMessage);
      return false;
    }
    if (day < 1 || day > 31) {
      if (Spanish) {
       	txtMessage = "Los d\u00EDas deben ser entre el 1 y el 31.";
      }
      else {
       	txtMessage = "Day must be between 1 and 31.";
      }
      alert(txtMessage);
      return false;
    }
    if ((month==4 || month==6 || month==9 || month==11) && day==31) {
      if (Spanish) {
       	txtMessage = "Este mes " + month + " no tiene 31 d\u00EDas!";
      }
      else {
       	txtMessage = "Month " + month + " doesn't have 31 days!";
      }
      alert(txtMessage);
      return false;
    }
    if (month == 2) { // check for february 29th
      var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
      if (day>29 || (day==29 && !isleap)) {
        if (Spanish) {
        	txtMessage = "El mes de febrero del " + year + " no tiene " + day + " d\u00EDas.";
        }
        else {
          	txtMessage = "February " + year + " doesn't have " + day + " days!";
        }
        alert(txtMessage);
        return false;
      }
    }
    return true;
  }
  
  function CalculateAge(DOB)
    {
      var i = DOB.indexOf("/");
      var j = DOB.indexOf("/",i+1);
      var Year = DOB.substring(j+1,DOB.length);
      var CurrentYear = new Date();
      var Age=(CurrentYear.getFullYear())-Year
      if (DebugFlag) alert("CalculateAge\n\nAge = " + Age);
      return Age;
    }

  function SetFocus(field)
    {
	field.focus();
	if (field.type=="text") {
		field.select();
		}
      if (DebugFlag)	
        {
          txtMessage   = "SetFocus\n";
          txtMessage += "\nfield.name = " + field.name;
          txtMessage += "\nfield.type = " + field.type;
          txtMessage += "\nfield.value = " + field.value;
          alert(txtMessage);
          txtMessage="";		// Reset it for next time.
        } 
	return;
    }