jQuery.fn.extend({
	getQuery: function(qt) {
		hu = window.location.search.substring(1);
		gy = hu.split("&");
		for (i = 0; i < gy.length; i++) {
			ft = gy[i].split("=");
			if (ft[0] == qt) {
				return ft[1];
			}
		}
	},
	scrollTo: function(speed, easing) {
		return this.each(function() {
			var targetOffset = $(this).offset().top;
			$('html,body').animate({ scrollTop: targetOffset }, speed, easing);
		});
	},
	onlyNumber: function() {
		return this.each(function() {
			$(this).bind("keydown", function(e) {
			    var keyCode = ($.browser.mozilla) ? e.which : event.keyCode;
			    // numpad's keys
			    if (keyCode > 95 && keyCode < 106)
			        return true;
			    // direction keys
			    if (keyCode > 36 && keyCode < 41)
			        return true;
			    if (keyCode == 9) 
			        return true;
			    // upper numeric keys
			    if ((keyCode < 48 || keyCode > 57) && keyCode != 8 && keyCode != 46 && keyCode != 0) {
			        return false;
			    }
			});
		});
	},
	onlyEmail: function() {
		return this.each(function() {
			$(this).bind("keydown", function(e) {
				var InvalidChars = " !#/*{[()]},;%^><\\?+:='`|şŞĞğÜüÇçÖöİı";
				kCode = InvalidChars.charAt(5);
				var keyCode = e.keyCode;
				if ((keyCode > 127 && keyCode != 222) || (keyCode == 73)) {
					return false;
				}
				for (i = 0; i <= InvalidChars.length - 1; i++) {
					if (keyCode == InvalidChars.charCodeAt(i)) {
						return false;
					}
				}
				return true;
			});
		});
	},
	onlyLetter: function() {
		return this.each(function() {
			$(this).bind("keydown", function(e) {
				var InvalidChars = "!#/*{[()]},;%^><\\?+:='`|&-_";
				var keyCode = e.keyCode;
				if (keyCode > 47 && keyCode < 58) {
					return false;
				}
				for (i = 0; i <= InvalidChars.length - 1; i++) {
					if (keyCode == InvalidChars.charCodeAt(i)) {
						return false;
					}
				}
			});
		});
	},
	placeHolder: function(attrName) {
		var _this;
		if (attrName == undefined || attrName == null) {
			attrName = "title";
		}
		return this.each(function() {
			_this = $(this);
			_this.val(_this.attr(attrName));
			_this.bind("focus", function() {
				if ($(this).val() == $(this).attr(attrName)) {
					$(this).val("");
				}
			});
			_this.bind("blur", function() {
				if ($(this).val() == "") {
					$(this).val($(this).attr(attrName));
				}
			});
		});
	},
	limitTextArea: function(maxlength) {
		function recalculate(objT) {
			var mobjT = $(objT)
			timeoutID = window.setTimeout(function() { truncateText(mobjT) }, 100);
		}
		function truncateText(mobjT) {
			var maxlength = mobjT.attr('limit');
			var toChange = mobjT.next();
			if (mobjT.val().length > maxlength) {
				mobjT.val(mobjT.val().substring(0, maxlength));
			}
			toChange.html((maxlength - mobjT.val().length) + ' Karakter kaldı.');
		}
		return this.each(function() {
			$(this).attr('limit', maxlength);
			$(this).after('<p class="remaining">' + maxlength + ' karakter kaldı.</span>');
			$(this).bind('keyup cut paste', function() {
				recalculate($(this));
			});
			recalculate(this);
		});
	},
	currency: function() {
		function del_comma(str) {
			while (str.indexOf(".") > 0) { str = str.replace(".", ""); }
			if (str.length < 2 && str[0] == 0) {
				str = 0;
			}
			return str;
		}
		this.each(function() {
			$(this).bind("keyup", function() {
				try {
					var tmpVal = "";
					var index = 0;
					var inputVal = $(this).val().toString();
					var dot_pos = inputVal.indexOf(",");
					if (dot_pos > 0)
						inputVal = inputVal.substr(0, dot_pos);

					inputVal = del_comma(inputVal);
					var len = Math.floor(((inputVal.length - 1) / 3));
					var begin = inputVal.length - len * 3;

					tmpVal = inputVal.substr(0, begin);
					var i = 0;
					for (i = 0; i < len; i++) {
						tmpVal = tmpVal + ".";
						var start_pos = i * 3 + begin;
						var tmp = inputVal.substr(start_pos, 3);
						tmpVal = tmpVal + tmp;
					}
					inputVal = tmpVal;
					$(this).val(inputVal);
				}
				catch (e) {
					return 0;
				}
			});
		});
	}
});