// JavaScript Document
//---formvalidations.js
//---takes care of most form validations...

//check the text value//
function checkitem(item, fdesc) { 
	var errorstr = "";
	if (item.value == "" || checkblanks(item.value) == true)  {
   		if (fdesc != "") { 
   			errorstr = "'" + fdesc + "' is required.\n";
		}
   }
   return errorstr;
 }

// following looks for all blanks in a string - typical of checking//
function checkblanks(item)  {
  var isblank = true;
  for (i = 0; i < item.length; i++) {
    if (item.charAt(i) != " ") {
      isblank = false;  }
  } 
  return isblank;
}

// check for valid emails....
function checkemail(item) {
  var goodmail = true;
  var addr = item.value;
  var invchar = " /:,;";
  var errorstr = "";
  var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/
  var emailFilter=/^.+@.+\..{2,3}$/;
  for (i=0; i<invchar.length; i++)  {
	badchar = invchar.charAt(i);
	if (addr.indexOf(badchar,0) > -1)  {
   		goodmail = false;
	}
  }
  atpos = addr.indexOf("@",1);
  if (atpos == -1) {
	goodmail = false;
  }
  else  {
	perpos = addr.indexOf(".",atpos);
	if (perpos == -1)  {
		goodmail = false;
	} else if (perpos + 3 > addr.length)  {
		goodmail = false;
	} else if (addr.match(illegalChars)) {
		goodmail = false;
	} else if (!(emailFilter.test(addr))) { 
		goodmail = false;
    }
  }
  if (goodmail == false) {
    errorstr = "Email address is not valid.\n";
  }
  return errorstr;
}

function IsNumericField(item, fdesc)
{
   var ValidChars = "0123456789.";
   var IsNumber=true;
   var Char;
   var errorstr = "";
   if (item.value.length==0) {
	   IsNumber = false;
   } else {
	   for (i = 0; i < item.value.length; i++) { 
		  Char = item.value.charAt(i); 
		  if (ValidChars.indexOf(Char) == -1) 
			 {
			 IsNumber = false;
			 break;
			 }
	   }
   }
   if (IsNumber == false) {
		errorstr = "'" + fdesc + "' must be numeric.\n";
   }
   return errorstr;
}

function IsNumeric(strString)
   //  check for valid numeric strings	
   {
   var strValidChars = "0123456789";
   var strChar;
   var blnResult = true;

   if (strString.value.length == 0) return false;

   //  test strString consists of valid characters listed above
   for (i = 0; i < strString.value.length && blnResult == true; i++)
      {
      strChar = strString.value.charAt(i);
      if (strValidChars.indexOf(strChar) == -1)
         {
         blnResult = false;
         }
      }
   return blnResult;
   }

// number formatting function
// copyright Stephen Chapman 24th March 2006
// permission to use this function is granted provided
// that this copyright notice is retained intact

function formatNumber(num,dec,thou,pnt,curr1,curr2,n1,n2) {
	var x = Math.round(num * Math.pow(10,dec));
	if (x >= 0) 
		n1=n2='';
	var y = (''+Math.abs(x)).split('');
	var z = y.length - dec;y.splice(z, 0, pnt);
	while (z > 3) {
		z-=3; 
		y.splice(z,0,thou);
	}
	var r = curr1+n1+y.join('')+n2+curr2;
	return r;
}