// version: beta
// created: 2005-08-30
// updated: 2005-08-31
// mredkj.com
function extractNumber(obj, decimalPlaces, allowNegative)
{
	var temp = obj.value;
	
	// avoid changing things if already formatted correctly
	var reg0Str = '[0-9]*';
	if (decimalPlaces > 0) {
		reg0Str += '\\.?[0-9]{0,' + decimalPlaces + '}';
	} else if (decimalPlaces < 0) {
		reg0Str += '\\.?[0-9]*';
	}
	reg0Str = allowNegative ? '^-?' + reg0Str : '^' + reg0Str;
	reg0Str = reg0Str + '$';
	var reg0 = new RegExp(reg0Str);
	if (reg0.test(temp)) return true;

	// first replace all non numbers
	var reg1Str = '[^0-9' + (decimalPlaces != 0 ? '.' : '') + (allowNegative ? '-' : '') + ']';
	var reg1 = new RegExp(reg1Str, 'g');
	temp = temp.replace(reg1, '');

	if (allowNegative) {
		// replace extra negative
		var hasNegative = temp.length > 0 && temp.charAt(0) == '-';
		var reg2 = /-/g;
		temp = temp.replace(reg2, '');
		if (hasNegative) temp = '-' + temp;
	}
	
	if (decimalPlaces != 0) {
		var reg3 = /\./g;
		var reg3Array = reg3.exec(temp);
		if (reg3Array != null) {
			// keep only first occurrence of .
			//  and the number of places specified by decimalPlaces or the entire string if decimalPlaces < 0
			var reg3Right = temp.substring(reg3Array.index + reg3Array[0].length);
			reg3Right = reg3Right.replace(reg3, '');
			reg3Right = decimalPlaces > 0 ? reg3Right.substring(0, decimalPlaces) : reg3Right;
			temp = temp.substring(0,reg3Array.index) + '.' + reg3Right;
		}
	}
	
	obj.value = temp;
}
function blockNonNumbers(obj, e, allowDecimal, allowNegative)
{
	var key;
	var isCtrl = false;
	var keychar;
	var reg;
		
	if(window.event) {
		key = e.keyCode;
		isCtrl = window.event.ctrlKey
	}
	else if(e.which) {
		key = e.which;
		isCtrl = e.ctrlKey;
	}
	
	if (isNaN(key)) return true;
	
	keychar = String.fromCharCode(key);
	
	// check for backspace or delete, or if Ctrl was pressed
	if (key == 8 || isCtrl)
	{
		return true;
	}

	reg = /\d/;
	var isFirstN = allowNegative ? keychar == '-' && obj.value.indexOf('-') == -1 : false;
	var isFirstD = allowDecimal ? keychar == '.' && obj.value.indexOf('.') == -1 : false;
	
	return isFirstN || isFirstD || reg.test(keychar);
}
$.fn.passwordStrength = function( options ){
	return this.each(function(){
		var that = this;that.opts = {};
		that.opts = $.extend({}, $.fn.passwordStrength.defaults, options);

		that.div = $(that.opts.targetDiv);
		that.defaultClass = that.div.attr('class');

		that.percents = (that.opts.classes.length) ? 100 / that.opts.classes.length : 100;

		v = $(this)
		.keyup(function(){
			if( typeof el == "undefined" )
			this.el = $(this);
			var s = getPasswordStrength (this.value);
			var p = this.percents;
			var t = Math.floor( s / p );

			if( 100 <= s )
			t = this.opts.classes.length - 1;

			this.div
			.removeAttr('class')
			.addClass( this.defaultClass )
			.addClass( this.opts.classes[ t ] );
		})
		
	});

	function getPasswordStrength(H){
		var D=(H.length);
		
	
		if (D<4) { D=0 }
		
		
		if(D>5){
			D=5
		}
		var F=H.replace(/[0-9]/g,"");
		var G=(H.length-F.length);
		if(G>3){G=3}
		var A=H.replace(/\W/g,"");
		var C=(H.length-A.length);
		if(C>3){C=3}
		var B=H.replace(/[A-Z]/g,"");
		var I=(H.length-B.length);
		if(I>3){I=3}
		var E=((D*10)-20)+(G*10)+(C*15)+(I*10);
		if(E<0){E=0}
		if(E>100){E=100}
		return E
	}
	
	
};