var error_str="" ;

var val = new Array();  // Decalre a array for storing current field value





function isDate(fieldvalue,fieldname) {

        // Rules for the date regular expression:

        // The format of the date is:

        // dd/mm/yyyy

        // Days: Valid between 1 and 31

        // The first digit may either be a 3 followed by a 0 or a 1 

        // or it could be a 0 followed by 1 to 9, or a 1 or 2, 

        // followed by any digit.

        // Then follows a backslash

        // Months: Valid between 1 and 12

        // The month may be a 0 followed by 1 to 9, or a 1 followed by 

        // either a 0, 1 or 2. 

        // Then follows a backslash

        // The year must comprise of any 4 digits.



        var re = /^([0-9]|0[1-9]|1[0-9]|2[0-9]|3[01])\/([1-9]|0[1-9]|1[012])\/\d{4}/;

		var months=[0,31,28,31,30,31,30,31,31,30,31,30,31]



        if (re.test(fieldvalue) != true) {

			error_str=error_str+"* "+fieldname+"  is invalid Date\n";

			return_tag=false

			return false

	}

	

	var dts = fieldvalue.split("/")



	if (((dts[2] % 4 == 0) && (dts[2] % 100 != 0)) || (dts[2] % 400 == 0)) dts[2]=29;

		

	if (dts[1]=="02" && parseInt(dts[0],10) > months[2]) {

			error_str=error_str+"* "+fieldname+" is invalid Date (Valid day is 1 to "+months[2]+")\n";

			return_tag=false

			return false

	}



	if (parseInt(dts[0],10) > months[parseInt(dts[1],10)]) {

			error_str=error_str+"* "+fieldname+" is invalid Date (Valid day is 1 to "+months[parseInt(dts[1],10)]+")\n";

			return_tag=false

			return false	

	} 

return true

}



function trim(str){

     return str.replace(/^\s+/g, '').replace(/\s+$/g, '');

}





function isName(fieldvalue,fieldname,Option) { 

	if(!Option) Option=""

	fieldvalue=trim(fieldvalue)

	if (fieldvalue=="") {

		if (Option!="") {

			error_str=error_str+"* " +fieldname+" is Empty\n";

			return

		} else return

	}



	for(var i=0; i<fieldvalue.length; i++) {

		var c = fieldvalue.charAt(i);

		if (!((c >= "a" && c<="z") ||(c >= "A" && c<="Z") || (c == "'") || (c==" ") || (c=="-") || (c=="."))) {

			error_str=error_str+"* "+fieldname+"  is not an Alphabets\n";

			return

	    	}

	}

}



function isEmpty(fieldvalue,fieldname) {

	if (trim(fieldvalue)=="")  error_str=error_str+"* " +fieldname+" is Empty\n";

}



function isInteger(fieldvalue,fieldname,min,max) { 

	fieldvalue=trim(fieldvalue)

	if (fieldvalue=="") {

		error_str=error_str+"* " +fieldname+" is Empty\n";

		return

	}



	for (i = 0; i < fieldvalue.length; i++){   

        	// Check that current character is number.

	        var c = fieldvalue.charAt(i);

        	if (((c < "0") || (c > "9"))) {

		error_str=error_str+"* "+fieldname+" is invalid \n";

		return false

		}

    	}

	if (min>0 && max>0)  

		if (fieldvalue < min || fieldvalue > max) error_str=error_str+"* "+fieldname+" allowed between "+ min + " and " + max + " \n";

	if (min==0 && max>0)

		if (fieldvalue > max) error_str=error_str+"* "+fieldname+"'s upper limit is " + max + " \n";

	if (min>0 && max==0)

		if (fieldvalue < min) error_str=error_str+"* "+fieldname+"'s lower limit is " + min + " \n";

	return true;

}



function isAlpha(fieldvalue,fieldname) { 

	fieldvalue=trim(fieldvalue)

	if (fieldvalue=="") {

		error_str=error_str+"* " +fieldname+" is Empty\n";

		return

	}



	for(var i=0; i<fieldvalue.length; i++) {

		var c = fieldvalue.charAt(i);

		if (!((c >= "a" && c<="z") ||(c >= "A" && c<="Z") || (c >= "0" && c<="9") )) {

			error_str=error_str+"* "+fieldname+"  is not Alphanumeric\n";

			return

	    }

	}

}





function isAddress(fieldvalue,fieldname) { 

	fieldvalue=trim(fieldvalue)

	if (fieldvalue=="") {

		error_str=error_str+"* " +fieldname+" is Empty\n";

		return

	}



	for(var i=0; i<fieldvalue.length; i++) {

		var c = fieldvalue.charAt(i);

		if (!((c >= "a" && c<="z") ||(c >= "A" && c<="Z") || (c >= "0" && c<="9")||(c=="#")||(c==",")||(c==".")||(c=="-")||(c=="'")||(c==" "))) {

			error_str=error_str+"* "+fieldname+"  is invalid\n";

			return

	    }

	}

}



function isPhone(fieldvalue,fieldname) { 

	fieldvalue=trim(fieldvalue)

	if (fieldvalue=="") {

		error_str=error_str+"* " +fieldname+" is Empty\n";

		return

	}



	for(var i=0; i<fieldvalue.length; i++) {

		var c = fieldvalue.charAt(i);

		if (!((c >= "0" && c<="9")||(c==")")||(c=="(")||(c==",")||(c=="-")||(c==" "))) {

			error_str=error_str+"* "+fieldname+" invalid Phone Number\n";

			return

	    }

	}

}



function isChar(fieldvalue,fieldname) { 

	fieldvalue=trim(fieldvalue)

	if (fieldvalue=="") {

		error_str=error_str+"* " +fieldname+" is Empty\n";

		return

	}



	for(var i=0; i<fieldvalue.length;i++) {

		var c = fieldvalue.charAt(i);

		if (!((c >= "a" && c<="z") ||(c >= "A" && c<="Z"))) {

			error_str=error_str+"* "+fieldname+"  is not Alphabet(s)\n";

			return_tag=false

			return

	    }

	}

}



function isDecimal(fieldvalue,fieldname) {

	fieldvalue=trim(fieldvalue)

	if (fieldvalue=="") {

		error_str=error_str+"* " +fieldname+" is Empty\n";

		return

	}

   for(var i=0; i<fieldvalue.length;i++) {

		var c = fieldvalue.charAt(i);

		if (c ==".") 

			continue

		if (!(c >= "0" && c<="9")) {

			error_str=error_str+"* "+fieldname+"  is not a number\n";

			return_tag=false

			return

	    }

	}

}



//decimal - with number of dots only one 

function isDec(fieldvalue,fieldname) {

	fieldvalue=trim(fieldvalue)

	if (fieldvalue=="") {

		error_str=error_str+"* " +fieldname+" is Empty\n";

		return

	}

var count_points=0

    for(var i=0; i<fieldvalue.length;i++) {

		var c = fieldvalue.charAt(i);

		if (c ==".") {

			count_points=count_points+1

			if (count_points>1) {

				error_str=error_str+"* "+fieldname+"  is not a Decimal\n";

				return_tag=false

				return

			}

			continue

		}

		if (!(c >= "0" && c<="9")) {

			error_str=error_str+"* "+fieldname+"  is not a Decimal\n";

			return_tag=false

			return

	    }

	}

}





function isEmail(fieldvalue) {

var checkTLD=1;

var emailPat=/^(.+)@(.+)$/

var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;

var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";

var validChars="\[^\\s" + specialChars + "\]";

var quotedUser="(\"[^\"]*\")";

var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;

var atom=validChars + '+';

var word="(" + atom + "|" + quotedUser + ")";

var userPat=new RegExp("^" + word + "(\\." + word + ")*$");

var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");

var matchArray=fieldvalue.match(emailPat);



if (matchArray==null) {

error_str=error_str+"* Email address format incorrect (check @ and .'s)\n"

return_tag = false

return false;

}



var user=matchArray[1];

var domain=matchArray[2];

for (i=0; i<user.length; i++) {

if (user.charCodeAt(i)>127) {

error_str=error_str+"* Invalid Email ID\n   Ths username contains invalid characters.";

return_tag = false

return false;

   }

}

for (i=0; i<domain.length; i++) {

if (domain.charCodeAt(i)>127) {

error_str=error_str+"* Invalid Email ID\n   Ths domain name contains invalid characters.";

return_tag = false

return false;

   }

}



// See if "user" is valid 



if (user.match(userPat)==null) {



// user is not valid

error_str=error_str+"* Invalid Email ID\n   The username doesn't seem to be valid.";

return_tag = false

return false;

}





var IPArray=domain.match(ipDomainPat);

if (IPArray!=null) {



// this is an IP address



for (var i=1;i<=4;i++) {

if (IPArray[i]>255) {

error_str=error_str+"* Invalid Email ID\n   Destination IP address is invalid!";

return_tag = false

return false;

   }

}

return true;

}



 

var atomPat=new RegExp("^" + atom + "$");

var domArr=domain.split(".");

var len=domArr.length;

for (i=0;i<len;i++) {

if (domArr[i].search(atomPat)==-1) {

error_str=error_str+"* Invalid Email ID\n   The domain name is not valid.";

return_tag = false

return false;

   }

}





if (checkTLD && domArr[domArr.length-1].length!=2 && 

domArr[domArr.length-1].search(knownDomsPat)==-1) {

error_str=error_str+"* Invalid Email ID\n   The address must end in a well-known domain or two letter " + "country.";

return_tag = false

return false;

}



if (len<2) {

error_str=error_str+"* Invalid Email ID\n   This address is missing a hostname!";

return_tag = false

return false;

}

return true;

}

//Email Check