var vemail="Email must be a valid Email address (like companyname@yahoo.com).";
var vzipcode=" must be a 6 or 5 (for US Country) digit Pin Code (eg: '600012' or '12345')";
var vempty=" should not be blank";
var whitespace = " \t\n\r";
var vnum=" should be a number";
var vRange = " should greater than ";

function checkNull(s,f){//To check Null values
	if (isWhitespace(s.value)) 
       return warnInvalid (s,f,vempty);
    else return true;
}

function checkCmb(s,f){//To check Null values


	if (s.value != "-1") 
	{
		
	    return true;   }
    else{ 
    s.focus();
   
     alert(f +vempty);
return false; }
    
}
function isWhitespace(s){ //To check whitespaces
    var i;
    if ((s == null) || (s.length == 0)) return true;
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (whitespace.indexOf(c) == -1) return false;
    }
    return true;
}

function warnInvalid(theField, s,errmsg){//Error message
    theField.focus();
	theField.select();
     alert(s +errmsg);
    return false;
}


function checkEmail (s,f,t){//To check Email  
	if (t == "r"){
		if (checkNull(s,f)){
			if (isEmail(s.value)){
				return true;   
				 }
			else{
					f="";
					return warnInvalid (s,f, vemail); 
			}
		}	
		else return false;
	}
	else{
		if (s.value != ""){
			if (isEmail(s.value)){
				return true;   
				 }
			else{
					f="";
					return warnInvalid (s,f, vemail); 
			}
		}	
		else return true;
	}		
}

function isEmail (s){ 
  if ((s == null) || (s.length == 0)) 
       if (isEmail.arguments.length == 1) return false;
       else return (isEmail.arguments[1] == true);
    if (isWhitespace(s)) return false;
    var i = 1;
    var sLength = s.length;
    while ((i < sLength) && (s.charAt(i) != "@")){ 
    i++
    }
    if ((i >= sLength) || (s.charAt(i) != "@")) return false;
    else i += 2;
    while ((i < sLength) && (s.charAt(i) != ".")){
     i++
    }
    if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
    else return true;
}

function checkNumber(s,f,t){//To check Number
	if (t == "r"){
		if (checkNull(s,f)){
			if (!isInteger(s.value)){
					return warnInvalid(s,f,vnum);
					
			}	
			else return true;
			}
		else return false;	
	}
	else{
			if (s.value != ""){
			if (!isInteger(s.value)){
				return warnInvalid(s,f,vnum);
			}	
			else return true;
			}
		else return true;
	}	
}

function checkValidNumber(s,f,t){//To check Number
	
	if(s.value +0 < t )
	{
	return warnInvalid(s,f,vRange + (t-1) );
			}	
			else return true;
			
	
}

function isInteger (s){
    var i;
    if ((s == null) || (s.length == 0)) 
       if (isInteger.arguments.length == 1) return false;
       else return (isInteger.arguments[1] == true);
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (!isDigit(c)) return false;
    }
    return true;
}


function checkZipcode(s,f,t){//To check Zipcode
if (t == "r"){ 
	if (s.value.length == 5 || s.value.length == 6){

				return checkNumber(s,f,t);

	  } 
	else return warnInvalid (s,f,vzipcode);	   
}
else{
	if (s.value != ""){
		if (s.value.length == 5 || s.value.length == 6){

					return checkNumber(s,f,t);

		  } 
		else return warnInvalid (s,f,vzipcode);	   
	}
	else return true;		
}
}


function isDigit (c){ 
  return ((c >= "0") && (c <= "9"));
}



//for check option button is select or not
function checkOpt(s,f){//To check Null values
var len=s.length,b;
for(i=0;i<len;i++)
{
b|=s[i].checked;
}
if(b)
return true;
else
{
s[0].focus();
alert(f+" " +vempty);
return false;
}
}

//for check it is a valid image or not
function checkimage(s,f)
{
name=s.value;
name=name.substring(name.lastIndexOf('.')+1);
if(name.toLowerCase()!="jpg" && name.toLowerCase()!="gif" && name.toLowerCase()!="bmp" && name.toLowerCase()!="jpeg")
{
alert (f+" is not a valid image. Pls select the valid picture");
return false;
}
else
return true;
}

//for check it is pdf file or not
function checkpdf(name)
{
name=name.substring(name.lastIndexOf('.')+1);
if(name.toLowerCase() !="pdf")
{
alert ("It is not a valid PDF file. Pls select the valid file");
return false;
}
}


//check it is number or not
function checknumber(s,f)
{
name=s.value;
if(isNaN(name))
{
alert(f+" it is not a numeric value");
s.focus();
return false;
}
else
return true;
}


//validation of email
function vdemail(a)
{
apos=a.indexOf("@");
  dotpos=a.lastIndexOf(".");
  if (apos<1||dotpos-apos<2)
    {
    document.getElementById('coloremail').innerHTML= "<font color='red' size='2em'>worng</font>";
    document.getElementById('eid').value="";
    }
  else
  {
  document.getElementById('coloremail').innerHTML= "<font color='green' size='2em'>right</font>";
  }
 }
 
 
 function selectdate(a)
{
document.getElementById(a).value="";
alert("Select the date form the Date Box");
}

function checkfromto(s,f)
{
fm=s.fmonth.selectedIndex;
tm=s.tmonth.selectedIndex;
fy=s.fyear.value;
ty=s.tyear.value;

if(ty>=fy && tm>=fm)
{
return true;
}
else
{
alert("To month and year lessthan from month and year");
document.getElementById('tmonth').value=-1;
document.getElementById('tyear').value=-1;
return false;
}
}

function confirmdelete()
{
if(confirm("do you want delete the record")==true)
return true;
else
return false;
}

function checkeditpdf()
{
var myForm = document.calform;
if(document.getElementById('file').value!="")
return checkpdf(myForm.file);
else
return true;
}