function countchar(character,str) {
	var count=0;
	for (var i=0;i<str.length;i++) {
		if (character==str.charAt(i))
		{
			count++;
		}
	}
	return count;
}

function char_repetition(password) { /// returns the max number of repetitions -> not really, returns 2 if there's any repetition
///TODO : make the function truely count the repetitions
	var max=0;
	for (var i=0;i<password.length;i++) {
		var current = countchar(password.charAt(i),password);
		if (current>max)
		{
			max = current;
		}
	}
	return max;
}

function keys_distance_check(password) {/// returns true if there are sequenced keys with distance of 1 - currently, no other distance exists. use of config variable requires that I add distances or create a path following technique
	var password_keydistancematrix = create_keyboard_distance_matrix();
	var max = 0;
	//brokenpass = explode("\n",chunk_split  (password, 1,"\n"));
	for (var i=0;i<(password.length-1);i++) {
		var distance = password_keydistancematrix[password.charCodeAt(i)][password.charCodeAt(i+1)]
		distance = (!distance) ? password_keydistancematrix[password.charCodeAt(i+1)][password.charCodeAt(i)] : distance;
		if ( distance > max ){
			max = distance;
		}
	}
	 return max;
}

function countnumbers(password) {
	var numbers = 0;
	for (var i=0;i<password.length ;i++ )
	{
		if (!isNaN(password.charAt(i)))
		{
			numbers++;
		}
	}
	return numbers;
}

function countletters(password) {
	return password.length-countnumbers(password);
}

function check_password_userinfo(password,username,firstname,lastname) {/// needs yet to be built
	if (password == username || password == firstname || password == lastname) {
		return false;
	}
	return true;
}


function incrementing_chars(password) {
	for (i=0;i<(password.length-1);i++) {
		if (((password.charCodeAt(i)+1)==password.charCodeAt(i+1)) || ((password.charCodeAt(i)-1)==password.charCodeAt(i+1))) {
			return true;
		}
	}
	return false;
}



function create_keyboard_distance_matrix() {
	var keyboardvalidchars = new Array();
	var chrcount=0;
	var str = "a";
	for (i="a".charCodeAt(0);i<="z".charCodeAt(0);i++,chrcount++) {
		keyboardvalidchars[chrcount]=i;
	}
	for (i="A".charCodeAt(0);i<="Z".charCodeAt(0);i++,chrcount++) {
		keyboardvalidchars[chrcount]=i;
	}
	for (i="0".charCodeAt(0);i<="9".charCodeAt(0);i++,chrcount++) {
		keyboardvalidchars[chrcount]=i;
	}
	/// hebrew alphabet needed

	var password_keydistancematrix = new Array();
	var validchars = keyboardvalidchars.length;
	for (var i=0;i<validchars;i++) {
		password_keydistancematrix[keyboardvalidchars[i]]=new Array();
		for (var j=0;j<validchars;j++) {
			password_keydistancematrix[keyboardvalidchars[i]][keyboardvalidchars[j]]=0;
		}
	}
	//now for the dirty work
	password_keydistancematrix['1'.charCodeAt(0)]['2'.charCodeAt(0)] = 1;
	password_keydistancematrix['2'.charCodeAt(0)]['3'.charCodeAt(0)] = 1;
	password_keydistancematrix['3'.charCodeAt(0)]['4'.charCodeAt(0)] = 1;
	password_keydistancematrix['4'.charCodeAt(0)]['5'.charCodeAt(0)] = 1;
	password_keydistancematrix['5'.charCodeAt(0)]['6'.charCodeAt(0)] = 1;
	password_keydistancematrix['6'.charCodeAt(0)]['7'.charCodeAt(0)] = 1;
	password_keydistancematrix['7'.charCodeAt(0)]['8'.charCodeAt(0)] = 1;
	password_keydistancematrix['8'.charCodeAt(0)]['9'.charCodeAt(0)] = 1;
	password_keydistancematrix['9'.charCodeAt(0)]['0'.charCodeAt(0)] = 1;
	
	password_keydistancematrix['1'.charCodeAt(0)]['q'.charCodeAt(0)] = 1;
	password_keydistancematrix['2'.charCodeAt(0)]['q'.charCodeAt(0)] = 1;
	password_keydistancematrix['2'.charCodeAt(0)]['w'.charCodeAt(0)] = 1;
	password_keydistancematrix['3'.charCodeAt(0)]['w'.charCodeAt(0)] = 1;
	password_keydistancematrix['3'.charCodeAt(0)]['e'.charCodeAt(0)] = 1;
	password_keydistancematrix['4'.charCodeAt(0)]['e'.charCodeAt(0)] = 1;
	password_keydistancematrix['4'.charCodeAt(0)]['r'.charCodeAt(0)] = 1;
	password_keydistancematrix['5'.charCodeAt(0)]['r'.charCodeAt(0)] = 1;
	password_keydistancematrix['5'.charCodeAt(0)]['t'.charCodeAt(0)] = 1;
	password_keydistancematrix['6'.charCodeAt(0)]['t'.charCodeAt(0)] = 1;
	password_keydistancematrix['6'.charCodeAt(0)]['y'.charCodeAt(0)] = 1;
	password_keydistancematrix['7'.charCodeAt(0)]['y'.charCodeAt(0)] = 1;
	password_keydistancematrix['7'.charCodeAt(0)]['u'.charCodeAt(0)] = 1;
	password_keydistancematrix['8'.charCodeAt(0)]['u'.charCodeAt(0)] = 1;
	password_keydistancematrix['8'.charCodeAt(0)]['i'.charCodeAt(0)] = 1;
	password_keydistancematrix['9'.charCodeAt(0)]['o'.charCodeAt(0)] = 1;
	password_keydistancematrix['0'.charCodeAt(0)]['o'.charCodeAt(0)] = 1;
	password_keydistancematrix['0'.charCodeAt(0)]['p'.charCodeAt(0)] = 1;

	password_keydistancematrix['q'.charCodeAt(0)]['w'.charCodeAt(0)] = 1;
	password_keydistancematrix['q'.charCodeAt(0)]['a'.charCodeAt(0)] = 1;
	password_keydistancematrix['w'.charCodeAt(0)]['a'.charCodeAt(0)] = 1;
	password_keydistancematrix['w'.charCodeAt(0)]['e'.charCodeAt(0)] = 1;
	password_keydistancematrix['w'.charCodeAt(0)]['s'.charCodeAt(0)] = 1;
	password_keydistancematrix['e'.charCodeAt(0)]['d'.charCodeAt(0)] = 1;
	password_keydistancematrix['e'.charCodeAt(0)]['r'.charCodeAt(0)] = 1;
	password_keydistancematrix['e'.charCodeAt(0)]['s'.charCodeAt(0)] = 1;
	password_keydistancematrix['r'.charCodeAt(0)]['d'.charCodeAt(0)] = 1;
	password_keydistancematrix['r'.charCodeAt(0)]['t'.charCodeAt(0)] = 1;
	password_keydistancematrix['r'.charCodeAt(0)]['f'.charCodeAt(0)] = 1;
	password_keydistancematrix['t'.charCodeAt(0)]['y'.charCodeAt(0)] = 1;
	password_keydistancematrix['t'.charCodeAt(0)]['f'.charCodeAt(0)] = 1;
	password_keydistancematrix['t'.charCodeAt(0)]['g'.charCodeAt(0)] = 1;
	password_keydistancematrix['y'.charCodeAt(0)]['u'.charCodeAt(0)] = 1;
	password_keydistancematrix['y'.charCodeAt(0)]['h'.charCodeAt(0)] = 1;
	password_keydistancematrix['y'.charCodeAt(0)]['g'.charCodeAt(0)] = 1;
	password_keydistancematrix['u'.charCodeAt(0)]['i'.charCodeAt(0)] = 1;
	password_keydistancematrix['u'.charCodeAt(0)]['j'.charCodeAt(0)] = 1;
	password_keydistancematrix['u'.charCodeAt(0)]['h'.charCodeAt(0)] = 1;
	password_keydistancematrix['i'.charCodeAt(0)]['o'.charCodeAt(0)] = 1;
	password_keydistancematrix['i'.charCodeAt(0)]['k'.charCodeAt(0)] = 1;
	password_keydistancematrix['i'.charCodeAt(0)]['j'.charCodeAt(0)] = 1;
	password_keydistancematrix['o'.charCodeAt(0)]['p'.charCodeAt(0)] = 1;
	password_keydistancematrix['o'.charCodeAt(0)]['l'.charCodeAt(0)] = 1;
	password_keydistancematrix['o'.charCodeAt(0)]['k'.charCodeAt(0)] = 1;
	password_keydistancematrix['p'.charCodeAt(0)]['l'.charCodeAt(0)] = 1;
	password_keydistancematrix['a'.charCodeAt(0)]['s'.charCodeAt(0)] = 1;
	password_keydistancematrix['a'.charCodeAt(0)]['z'.charCodeAt(0)] = 1;
	password_keydistancematrix['s'.charCodeAt(0)]['d'.charCodeAt(0)] = 1;
	password_keydistancematrix['s'.charCodeAt(0)]['x'.charCodeAt(0)] = 1;
	password_keydistancematrix['s'.charCodeAt(0)]['z'.charCodeAt(0)] = 1;
	password_keydistancematrix['d'.charCodeAt(0)]['f'.charCodeAt(0)] = 1;
	password_keydistancematrix['d'.charCodeAt(0)]['c'.charCodeAt(0)] = 1;
	password_keydistancematrix['d'.charCodeAt(0)]['x'.charCodeAt(0)] = 1;
	password_keydistancematrix['f'.charCodeAt(0)]['g'.charCodeAt(0)] = 1;
	password_keydistancematrix['f'.charCodeAt(0)]['v'.charCodeAt(0)] = 1;
	password_keydistancematrix['f'.charCodeAt(0)]['c'.charCodeAt(0)] = 1;
	password_keydistancematrix['g'.charCodeAt(0)]['h'.charCodeAt(0)] = 1;
	password_keydistancematrix['g'.charCodeAt(0)]['b'.charCodeAt(0)] = 1;
	password_keydistancematrix['g'.charCodeAt(0)]['v'.charCodeAt(0)] = 1;
	password_keydistancematrix['h'.charCodeAt(0)]['j'.charCodeAt(0)] = 1;
	password_keydistancematrix['h'.charCodeAt(0)]['n'.charCodeAt(0)] = 1;
	password_keydistancematrix['h'.charCodeAt(0)]['b'.charCodeAt(0)] = 1;
	password_keydistancematrix['j'.charCodeAt(0)]['k'.charCodeAt(0)] = 1;
	password_keydistancematrix['j'.charCodeAt(0)]['m'.charCodeAt(0)] = 1;
	password_keydistancematrix['j'.charCodeAt(0)]['n'.charCodeAt(0)] = 1;
	password_keydistancematrix['k'.charCodeAt(0)]['l'.charCodeAt(0)] = 1;
	password_keydistancematrix['k'.charCodeAt(0)]['m'.charCodeAt(0)] = 1;
	password_keydistancematrix['z'.charCodeAt(0)]['x'.charCodeAt(0)] = 1;
	password_keydistancematrix['x'.charCodeAt(0)]['c'.charCodeAt(0)] = 1;
	password_keydistancematrix['c'.charCodeAt(0)]['v'.charCodeAt(0)] = 1;
	password_keydistancematrix['v'.charCodeAt(0)]['b'.charCodeAt(0)] = 1;
	password_keydistancematrix['b'.charCodeAt(0)]['n'.charCodeAt(0)] = 1;
	password_keydistancematrix['n'.charCodeAt(0)]['m'.charCodeAt(0)] = 1;

	for (var i=0;i<validchars;i++) { /// capitals
		if (keyboardvalidchars[i]>="a".charCodeAt(0) && keyboardvalidchars[i]<="z".charCodeAt(0)) {
			for (var j=0;j<validchars;j++) {
				if ((password_keydistancematrix[keyboardvalidchars[i]][keyboardvalidchars[j]]>0) && ((keyboardvalidchars[j]>="a".charCodeAt(0)) && (keyboardvalidchars[j]<="z".charCodeAt(0)))) {
					var keyi = keyboardvalidchars[i].toString().toUpperCase().charCodeAt(0);
					var keyj = keyboardvalidchars[j].toString().toUpperCase().charCodeAt(0);
					password_keydistancematrix[keyi][keyj] = 1;
				}
			}
		}
	}

	return password_keydistancematrix;
}









invalidChars=" /:,;\"'?<>#%&"
englishChars="qwertyuiopasdfghjklzxcvbnm QWERTYUIOPASDFGHJKLZXCVBNM1234567890.,@-)(*";
numChars="1234567890";

function check_invalid_chars(string){
	for (i=0; i<invalidChars.length;i++){
		badChar=invalidChars.charAt(i)
		if(string.indexOf(badChar,0)>-1){
			return false;
		}
	}
	return true;
}
function check_english_chars(string){//englishChars
	for (i=0; i<string.length;i++){
		Char=string.charAt(i)
		if(englishChars.indexOf(Char,0)==-1){
			return false;
		}
	}
	return true;
}
function check_numeric_chars(string){
	for (i=0; i<string.length;i++){
		Char=string.charAt(i)
		if(numChars.indexOf(Char,0)==-1){
			return false;
		}
	}
	return true;
}
function check_value_length(string,minimum,maximum){
	if(string.length<minimum || string.length>maximum){
		return false
	}
	return true;
}

function check_correct_email(string){
	atPos=string.indexOf("@",1)
	if (atPos==-1){
		return false
	}
	if (string.indexOf("@",atPos+1)!=-1){
		return false
	}
	periodPos=string.indexOf(".",atPos)
	if (periodPos==-1){
		return false
	}
	if (periodPos+3>string.length){
		return false
	}
	return true;
}

function check_id_number(element) {
	/// break apart into digits
	idnumber=element;
	var digits=new Array();
	if (parseInt(idnumber)==0) {
			return false;
	} else if (idnumber.length<9) {
		/// pad with zeros
		if (idnumber.length<5) {
			return false;
		}
		for (var i=0;i<(9-idnumber.length);i++) {
			idnumber="0"+idnumber;
		}
	} else if (idnumber.length>9) {
		return false;
	}
	for (i=0;i<9;i++) {
		digits[i]=idnumber.substr(i,1);
	}
	/// array of intervaling 1's and 2's
	var result_array=new Array(1,2,1,2,1,2,1,2,1);
	/// multiplication of arrays
	for (i=0;i<9;i++) {
		result_array[i]*=parseInt(digits[i]);
	}
	/// make result array into single digits (addition of two digits)
	for (i=0;i<9;i++) {
		if (result_array[i].toString().length>1)
			result_array[i]=(parseInt(result_array[i].toString().substr(0,1))+parseInt(result_array[i].toString().substr(1,1)));
	}
	/// add result array's values
	var sum=0;
	for (i=0;i<result_array.length;i++) {
		sum+=parseInt(result_array[i]);
	}
	/// make modulus check
	if ((sum%10)!=0) {
		return false;
	} else {
		return true;
	}
}