//////////////////////////////////////////////////////////////////////
//  function: trim
//      return the string that is trimmed.
//////////////////////////////////////////////////////////////////////
String.prototype.trim = function() 
{
    // skip leading and trailing whitespace
    // and return everything in between
    return this.replace(/^\s*(\b.*\b|)\s*$/, "$1");
}

//////////////////////////////////////////////////////////////////////
//  function: isNull
//      return true if value is null.
//////////////////////////////////////////////////////////////////////	
function isNull(sVal)
{
	if (sVal.trim.length==0){
		return(true);		   
	}	
	return(false);
}

//////////////////////////////////////////////////////////////////////
//	function: checkNull
//	to check whether the string is empty or null
//////////////////////////////////////////////////////////////////////
function checkNull(to)
{
    if (to.length==0)
    {
        return(false);
    }
    return(true);
}

//////////////////////////////////////////////////////////////////////
//  function: validateEmail
//      return true - if valid email address is entered
//      return false - if invalid email address is entered
//////////////////////////////////////////////////////////////////////
function validateEmail(email) 
{
	if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(email)){
		return true;
	}
	return false;
}

//////////////////////////////////////////////////////////////////////
//  function: checkDates 
//  parameter : Start Date value, End Date value
//      return true - if start date is not greater than end date. (Valid scenario)
//      return false - if start date is greater than end date. (Invalid scenario, should prompt invalid message)
//////////////////////////////////////////////////////////////////////
function checkDates(startdt, enddt) 
{
    if (startdt.length > 0 && enddt.length > 0) {
        var startDD = startdt.substring(0,2);
        var startMM = startdt.substring(3,5);
        var startYYtime = startdt.substring(6,startdt.length);                
        var strStartDate = startMM + "/" + startDD + "/" + startYYtime;
        //alert (strStartDate);
        
        var endDD = enddt.substring(0,2);
        var endMM = enddt.substring(3,5);
        var endYYtime = enddt.substring(6,startdt.length);
        var strEndDate = endMM + "/" + endDD + "/" + endYYtime;
        //alert (strEndDate);
        
        var startdate = new Date(strStartDate);
        var enddate = new Date(strEndDate);
        
        if (startdate > enddate) {
            return false;
        }
    }
    return true;
}

//////////////////////////////////////////////////////////////////////
//  function: isValidChar 
//			check if the input string entered consists of any invalid charaters
//  parameter : the input string
//      return true - if consists of any invalid charater
//      return false - if no invalid charater
//////////////////////////////////////////////////////////////////////
function isValidChar(str) 
{
    var invalidChar = "!@#$%^&*()-~,'<.>/?;:\|"
    for(i=0; i<invalidChar.length; i++) {
        if(str.indexOf(invalidChar.charAt(i)) > -1) {
            return false;
        }
    }
    return true;
}


function isValidChar(str, specialChar)
{
    if (str != ""){
    	for (var i=0; i<str.length; i++) {
		 	temp= str.substring(i,i+1);
            if (specialChar.indexOf(temp)!=-1) {
                return false;
            }
        }
    }
	return true;
}

//////////////////////////////////////////////////////////////////////
//  function: isChecked 
//			if more than one checkboxes, then number of checked checkboxes will be calculated;
//			else if only one checkbox, then only the checkbox's status will be examined.
//  parameter : the form field
//      return true - if at least one checkbox is checked
//      return false - if no checkbox is checked
//////////////////////////////////////////////////////////////////////
function isChecked(field)
{
	var bChecked = false;
	if (field.length != undefined){
		for (i = 0; i < field.length; i++){
			if (field[i].checked) 
				bChecked = true;
         }
     } else if (field.checked)
     	bChecked = true;
     return bChecked;
}

/**
 * This function is to Replace a string with another within a given text (like String.replace(),  but with multiple characters).
 * @param: a_strText, String value
 * @param: a_strFrom, char need to be searched and replace.
 * @param: a_strTo, new char that will replace the found char.
 * Return the replaced string value
*/
function replaceValue(a_strText, a_strFrom, a_strTo)
{
    var _c = a_strText.indexOf(a_strFrom);
    var _l = a_strFrom.length;
    var _start = 0;
    while (_c > -1 && _start < a_strText.length) {
      	if (_c == 0){
        	a_strText =  a_strTo + a_strText.substring(_c+_l);
  		}else{
        	a_strText = a_strText.substring(0,_c) + a_strTo + a_strText.substring(_c+_l);
    	}
         _start = _c + _l;
         _c = a_strText.indexOf(a_strFrom,_start);

    }//end while
    return a_strText;
}

function printWindow() {
    document.all['sButton'].style.display='none';
    window.print();
    document.all['sButton'].style.display='inline';
}

var gAutoPrint = true; // Flag for whether or not to automatically call the print function
function printContent()
{
	if (document.getElementById != null)
	{
		var html = '<HTML>\n<HEAD>\n';
		if (document.getElementsByTagName != null) {
			var headTags = document.getElementsByTagName("head");
			if (headTags.length > 0)
				html += headTags[0].innerHTML;
		}
		html += '\n</HE' + 'AD>\n<BODY>\n';
		var printReadyElem = document.getElementById("printReady");
		if (printReadyElem != null) {
			html += printReadyElem.innerHTML;
		} else {
			alert("Could not find the printReady section in the HTML");
			return;
		}
		html += '\n</BO' + 'DY>\n</HT' + 'ML>';
		var printWin = window.open("","printContent");
		printWin.document.open();
		printWin.document.write(html);
		printWin.document.close();
		if (gAutoPrint){
			printWin.print();
		}
	} else {
		alert("Sorry, the print ready feature is only available in modern browsers.");
	}
}


function checkEnter(form){
	if(event.keyCode) {
   		if(event.keyCode=="13") // 13 == Enter
        	form.submit();
    } else if(event.which) {
        if(event.which=="13")
            form.submit();
    } else if (window.event.keyCode == 13){
        form.submit();
    }
}

function getCurrentDate()
{
	// Get today's current date.
	var now  = new Date();
	var day  = now.getDate();
	var mnth = now.getMonth()+1;
	var year = (now.getYear() < 1000)? now.getYear() + 1900 : now.getYear();
	if(day < 10) day = '0' + day;
	if(mnth < 10) mnth = '0' + mnth;
	var todayDate = day+'/'+mnth+'/'+year;
	return todayDate;
}

function disableButtons(fm){       
    var totalButton = 0;
    for (var i=0;i<fm.elements.length;i++) {
        var e = fm.elements[i];
        if (e.type=='button' || e.type=='submit' || e.type=='reset') {
            totalButton++;
            e.disabled=true;
        }
    }
}

function checkAll(fm) {
    for (var i=0;i<fm.elements.length;i++) {
        var ele = fm.elements[i];
        if (ele.name != 'allbox' && ele.type=='checkbox') {
            ele.checked = fm.allbox.checked;
        }
    }
}

function replaceAll( str, from, to ) {
    var idx = str.indexOf( from );
    while ( idx > -1 ) {
        str = str.replace( from, to ); 
        idx = str.indexOf( from );
    }
    return str;
}

function disableButtons(fm){       
    var totalButton = 0;
    for (var i=0;i<fm.elements.length;i++) {
        var e = fm.elements[i];
        if (e.type=='button' || e.type=='submit' || e.type=='reset') {
            totalButton++;
            e.disabled=true;
        }
    }
}