var previousStyle;

function showHand(event, show) {
   var element = getSrcElement(event);
   if(element.parentNode.nodeName == "TD") {
      var element = element.parentNode;
   }      
   if(show) {
      previousStyle = element.parentNode.style.backgroundColor;
      element.parentNode.style.backgroundColor = "#2B65EC";
      element.parentNode.style.color = "white";
      element.style.cursor = "hand";
   } else {
      element.parentNode.style.backgroundColor = previousStyle;
      element.parentNode.style.color = "black";
      element.style.cursor = "pointer";
   }            
}

function getSrcElement(event) {
   if(event.target) {
      return event.target;
   } else {
      return event.srcElement;
   }
}

function forward(forwardTo) {
   location.href=forwardTo;
}

function showHourGlass(show) {
   if(show) {
      document.body.style.cursor = 'wait';
   }
   else {
      document.body.style.cursor = 'default';
   }
}

/**
 * DHTML date validation script for dd/mm/yyyy. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// Declaring valid date character, minimum year and maximum year
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 strDay=dtStr.substring(0,pos1)
	var strMonth=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 : dd/mm/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

}


// retrieve text of an XML document element, including
// elements using namespaces
function getElementTextNS(prefix, local, parentElem, index) {
       var result = "";
           if (prefix && isIE) {
                      // IE/Windows way of handling namespaces
                      result = parentElem.getElementsByTagName(prefix + ":" + local)[index];
                          } else {
                                     // the namespace versions of this method 
                                     // (getElementsByTagNameNS()) operate
                                     // differently in Safari and Mozilla, but both
                                     // return value with just local name, provided 
                                     // there aren't conflicts with non-namespace element
                                     // names
                                     if (parentElem) {
                                        result = parentElem.getElementsByTagName(local)[index];
                                     } else {
                                       return '';
                                     }
                                         }
               if (result) {
                          // get text, accounting for possible
                          // whitespace (carriage return) text nodes 
                          if (result.childNodes.length > 1) {
                                         return result.childNodes[1].data; //nodeValue;
                                                 } else {
                                                                if (result.firstChild) { 
                                                                return result.firstChild.data;// nodeValue;         
                                                                } else {
                                                                   return "";
                                                                }
                                                                        }
                              } else {
                                         return null;
                                             }
}





function opacity(id, opacStart, opacEnd, millisec) {
    //speed for each frame
    var speed = Math.round(millisec / 100);
    var timer = 0;

    //determine the direction for the blending, if start and end are the same nothing happens
    if(opacStart > opacEnd) {
        for(i = opacStart; i >= opacEnd; i--) {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    } else if(opacStart < opacEnd) {
        for(i = opacStart; i <= opacEnd; i++)
            {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    }
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
    var object = document.getElementById(id).style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";
}