function roll(obj, highlightcolor, textcolor){
                obj.style.background = highlightcolor;
                obj.style.color = textcolor;
            }
			/*
function rollImage(obj, url, textcolor){
                obj.style.background = url;
                obj.style.color = textcolor;
            }*/

function ltrim(str) { 
	for(var k = 0; k < str.length && isWhitespace(str.charAt(k)); k++);
	return str.substring(k, str.length);
}
function rtrim(str) {
	for(var j=str.length-1; j>=0 && isWhitespace(str.charAt(j)) ; j--) ;
	return str.substring(0,j+1);
}
function trim(str) {
	return ltrim(rtrim(str));
}
function isWhitespace(charToCheck) {
	var whitespaceChars = " \t\n\r\f";
	return (whitespaceChars.indexOf(charToCheck) != -1);
}

function areCheckBoxesSelected(FormName, FieldName) {
		var selected = false;
	if(!document.forms[FormName]) {
		return selected;
		}
	var objCheckBoxes = document.forms[FormName].elements[FieldName];

	if(!objCheckBoxes) {
		return selected;
	}
	var n_check_boxes = objCheckBoxes.length;
	if (typeof n_check_boxes == 'undefined') {
		objCheckBoxes = document.forms[FormName].elements[0];
		n_check_boxes = 1;
	}
	

		for(var i = 0; i < n_check_boxes; i++) {
			if (n_check_boxes > 1 && objCheckBoxes[i].checked == true)  {
				selected = true;
				break;
			}
			else if (n_check_boxes == 1 && objCheckBoxes.checked == true) {
				selected = true;
				break;
			}
			
}
return selected;
}
function setAllCheckBoxes(FormName, FieldName, CheckValue)
{
	
	if(!document.forms[FormName])
		return;
	var objCheckBoxes = document.forms[FormName].elements[FieldName];
	if(!objCheckBoxes)
		return;
	var countCheckBoxes = objCheckBoxes.length;
	if(!countCheckBoxes)
		objCheckBoxes.checked = CheckValue;
	else
		// set the check value for all check boxes
		for(var i = 0; i < countCheckBoxes; i++)
			objCheckBoxes[i].checked = CheckValue;
}


var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		alert("The date format should be : mm/dd/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
return true
}

function isTime(value) {
   var colonCount = 0;
   var hasMeridian = false;
   for (var i=0; i<value.length; i++) {
      var ch = value.substring(i, i+1);
      if ( (ch < '0') || (ch > '9') ) {
         if ( (ch != ':') 
		 /*&& (ch != ' ') && (ch != 'a') && (ch != 'A') && (ch != 'p') && (ch != 'P') && (ch != 'm') && (ch != 'M')
		  * */
		  ) {
            alert("Please enter a valid seperator: :");
		    return false;
         }
      }
      if (ch == ':') { colonCount++; }
      if ( (ch == 'p') || (ch == 'P') || (ch == 'a') || (ch == 'A') ) { hasMeridian = true; }
   }
  // if ( (colonCount < 1) || (colonCount > 2) ) { 
   if ( colonCount < 2 || colonCount > 2  ) { 
  alert("Please enter a valid time: hr:mn:ss");
   return false; 
   }
   var hh = value.substring(0, value.indexOf(":"));
   if ( (parseFloat(hh) < 0) || (parseFloat(hh) > 23) ) { 
    alert("Please enter a valid hours value: 00 - 23");
   return false; 
   }
   if (hasMeridian) {
     alert("Please enter a valid time in 24 hrs format: hr:mn:ss, do not enter AM, PM");
	 return false;
	  /*if ( (parseFloat(hh) < 1) || (parseFloat(hh) > 12) ) { 
	   alert("Please enter a valid hours value: 00 - 23 or 1 - 12");
	  return false; 
	  }*/
   }
   if (colonCount == 2) {
      var mm = value.substring(value.indexOf(":")+1, value.lastIndexOf(":"));
   } else {
      var mm = value.substring(value.indexOf(":")+1, value.length);
   }
   if ( (parseFloat(mm) < 0) || (parseFloat(mm) > 59) ) { 
  alert("Please enter a valid minutes value: 00 - 59");
   return false; 
   }
   if (colonCount == 2) {
      var ss = value.substring(value.lastIndexOf(":")+1, value.length);
   } else {
      var ss = "00";
   }
   if ( (parseFloat(ss) < 0) || (parseFloat(ss) > 59) ) { 
   alert("Please enter a valid seconds value: 00 - 59");
   return false; 
   }
   return true;
}


////////////////////////////////////
function getSelectedCheckbox(buttonGroup) {
   // Go through all the check boxes. return an array of all the ones
   // that are selected (their position numbers). if no boxes were checked,
   // returned array will be empty (length will be zero)
   var retArr = new Array();
   var lastElement = 0;
   if (buttonGroup[0]) { // if the button group is an array (one check box is not an array)
      for (var i=0; i<buttonGroup.length; i++) {
         if (buttonGroup[i].checked) {
            retArr.length = lastElement;
            retArr[lastElement] = i;
            lastElement++;
         }
      }
   } else { // There is only one check box (it's not an array)
      if (buttonGroup.checked) { // if the one check box is checked
         retArr.length = lastElement;
         retArr[lastElement] = 0; // return zero as the only array value
      }
   }
   return retArr;
} // Ends the "getSelectedCheckbox" function


function getSelectedCheckboxValue(buttonGroup) {
   // return an array of values selected in the check box group. if no boxes
   // were checked, returned array will be empty (length will be zero)
   var retArr = new Array(); // set up empty array for the return values
   var selectedItems = getSelectedCheckbox(buttonGroup);
   if (selectedItems.length != 0) { // if there was something selected
      retArr.length = selectedItems.length;
      for (var i=0; i<selectedItems.length; i++) {
         if (buttonGroup[selectedItems[i]]) { // Make sure it's an array
            retArr[i] = buttonGroup[selectedItems[i]].value;
         } else { // It's not an array (there's just one check box and it's selected)
            retArr[i] = buttonGroup.value;// return that value
         }
      }
   }
   return retArr;
} 
function getSelectedRadio(buttonGroup) {
   // returns the array number of the selected radio button or -1 if no button is selected
   if (buttonGroup[0]) { // if the button group is an array (one button is not an array)
      for (var i=0; i<buttonGroup.length; i++) {
         if (buttonGroup[i].checked) {
            return i
         }
      }
   } else {
      if (buttonGroup.checked) { return 0; } // if the one button is checked, return zero
   }
   // if we get to this point, no radio button is selected
   return -1;
} // Ends the "getSelectedRadio" function
function getSelectedRadioValue(buttonGroup) {
   // returns the value of the selected radio button or "" if no button is selected
   var i = getSelectedRadio(buttonGroup);
   if (i == -1) {
      return "";
   } else {
      if (buttonGroup[i]) { // Make sure the button group is an array (not just one button)
         return buttonGroup[i].value;
      } else { // The button group is just the one button, and it is checked
         return buttonGroup.value;
      }
   }
} // Ends the "getSelectedRadioValue" function