var dtCh= "-";
var minYear=1900;
var maxYear=2100;
/*
document.oncontextmenu = function(){
window.status = 'Right-click is disabled';
return false;
} 


//MSIE6 disable F5 && ctrl+r && ctrl+n
document.onkeydown=function(){
//alert('keycode='+event.keyCode + 'event.ctrlKey='+event.ctrlKey );
    switch (event.keyCode) {
        case 116 : //F5
        event.returnValue=false;
        event.keyCode=0;
        window.status = 'Refresh is disabled';
        return false;
        case 78: //n
        if (event.ctrlKey) {
        event.returnValue=false;
        event.keyCode=0;
        window.status = 'New window is disabled';
        return false;
        }
        case 82 : //r
        if (event.ctrlKey) {
        event.returnValue=false;
        event.keyCode=0;
        window.status = 'Refresh is disabled';
        return false;
        }
    }
}


// diasable back button
window.history.forward(1); 

*/
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 strYear=dtStr.substring(0,pos1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strDay=dtStr.substring(pos2+1)
	/*
	alert(strYear);
	alert(strMonth);
	alert(strDay);
	*/
	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 : yyyy-mm-dd")
		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 ValidateForm(){
	var dt=document.frmSample.txtDate
	if (isDate(dt.value)==false){
		dt.focus()
		return false
	}
    return true
 }
 
 

function trim(stringToTrim)
{
 return stringToTrim.replace(/^\s+|\s+$/g,"");
}


function CheckEmail(org) {
    email = org.value
    AtPos = email.indexOf("@")
    StopPos = email.lastIndexOf(".")
    Message = ""

    if (email == "") {
    Message = "Invalid email address" + "\n"
    }

    if (AtPos == -1 || StopPos == -1) {
    Message = "Invalid email address"
    }

    if (StopPos < AtPos) {
    Message = "Invalid email address"
    }

    if (StopPos - AtPos == 1) {
    Message = "Invalid email address"
    }

    return Message
}


function ismaxlength(obj, maxLength){
        var mlength=obj.getAttribute? parseInt(maxLength) : ""
                
            if (obj.getAttribute && obj.value.length>mlength)
                return false;
            else
                return true;                
            //obj.value=obj.value.substring(0,mlength)
    }    
    
    
function Message(str){
        alert(str);
    }