/*
 * ScrollToElement 1.0
 * Copyright (c) 2009 Lauri Huovila, Neovica Oy
 *  lauri.huovila@neovica.fi
 *  http://www.neovica.fi
 *  
 * Dual licensed under the MIT and GPL licenses.
 *
 * scroll to element: 					$(this).scrollTo(500);
 * center element in page: 			$(this).centerOnScreen()
 * center element in page: 			$(this).centerOnScreen(true, false)
 * center element in page: 			$(this).centerOnScreen(50, 50)
 */

(function($) { // scroll to element
    $.scrollToElement = function( $element, speed ) {

        speed = speed || 750;

        $("html, body").animate({
            scrollTop: $element.offset().top,
            scrollLeft: $element.offset().left
        }, speed);
        return $element;
    };

    $.fn.scrollTo = function( speed ) {
        speed = speed || "normal";
        return $.scrollToElement( this, speed );
    };
		
})(jQuery);

(function($) { // center element in page
					
			$.center = function( $element, h, v ) {
				$element.css("position","absolute");
				if(v==true || v==null){
					$element.css("top", ( $(window).height() - $element.height() ) / 2+$(window).scrollTop() + "px");
				}else if(v>0){
					$element.css("top", v+$(window).scrollTop() + "px");
				}
				if(h==true || h==null){
					$element.css("left", ( $(window).width() - $element.width() ) / 2+$(window).scrollLeft() + "px");
				}else if(h>0){
					$element.css("left", h+$(window).scrollLeft() + "px");
				}
				return $element;
			};
	
		$.fn.centerOnScreen = function(h, v) {
			return $.center( this, h, v );
		};
		
})(jQuery);


/*
 * Allows only valid characters to be entered into input boxes.
 * Note: does not validate that the final text is a valid number
 * (that could be done by another script, or server-side)
 *
 * @name     numeric
 * @param    decimal      Decimal separator (e.g. '.' or ',' - default is '.')
 * @param    callback     A function that runs if the number is not valid (fires onblur)
 * @author   Sam Collett (http://www.texotela.co.uk)
 * @example  $(".numeric").numeric();
 * @example  $(".numeric").numeric(",");
 * @example  $(".numeric").numeric(null, callback);
 *
 */
(function($) { // 
		jQuery.fn.numeric = function(decimal, callback)
		{
			decimal = decimal || ".";
			callback = typeof callback == "function" ? callback : function(){};
			this.keypress(
				function(e)
				{
					var key = e.charCode ? e.charCode : e.keyCode ? e.keyCode : 0;
					// allow enter/return key (only when in an input box)
					if(key == 13 && this.nodeName.toLowerCase() == "input")
					{
						return true;
					}
					else if(key == 13)
					{
						return false;
					}
					var allow = false;
					// allow Ctrl+A
					if((e.ctrlKey && key == 97 /* firefox */) || (e.ctrlKey && key == 65) /* opera */) return true;
					// allow Ctrl+X (cut)
					if((e.ctrlKey && key == 120 /* firefox */) || (e.ctrlKey && key == 88) /* opera */) return true;
					// allow Ctrl+C (copy)
					if((e.ctrlKey && key == 99 /* firefox */) || (e.ctrlKey && key == 67) /* opera */) return true;
					// allow Ctrl+Z (undo)
					if((e.ctrlKey && key == 122 /* firefox */) || (e.ctrlKey && key == 90) /* opera */) return true;
					// allow or deny Ctrl+V (paste), Shift+Ins
					if((e.ctrlKey && key == 118 /* firefox */) || (e.ctrlKey && key == 86) /* opera */
					|| (e.shiftKey && key == 45)) return true;
					// if a number was not pressed
					if(key < 48 || key > 57)
					{
						/* '-' only allowed at start */
						if(key == 45 && this.value.length == 0) return true;
						/* only one decimal separator allowed */
						if(key == decimal.charCodeAt(0) && this.value.indexOf(decimal) != -1)
						{
							allow = false;
						}
						// check for other keys that have special purposes
						if(
							key != 8 /* backspace */ &&
							key != 9 /* tab */ &&
							key != 13 /* enter */ &&
							key != 35 /* end */ &&
							key != 36 /* home */ &&
							key != 37 /* left */ &&
							key != 39 /* right */ &&
							key != 46 /* del */
						)
						{
							allow = false;
						}
						else
						{
							// for detecting special keys (listed above)
							// IE does not support 'charCode' and ignores them in keypress anyway
							if(typeof e.charCode != "undefined")
							{
								// special keys have 'keyCode' and 'which' the same (e.g. backspace)
								if(e.keyCode == e.which && e.which != 0)
								{
									allow = true;
								}
								// or keyCode != 0 and 'charCode'/'which' = 0
								else if(e.keyCode != 0 && e.charCode == 0 && e.which == 0)
								{
									allow = true;
								}
							}
						}
						// if key pressed is the decimal and it is not already in the field
						if(key == decimal.charCodeAt(0) && this.value.indexOf(decimal) == -1)
						{
							allow = true;
						}
					}
					else
					{
						allow = true;
					}
					return allow;
				}
			)
			.blur(
				function()
				{
					var val = jQuery(this).val();
					if(val != "")
					{
						var re = new RegExp("^\\d+$|\\d*" + decimal + "\\d+");
						if(!re.exec(val))
						{
							callback.apply(this);
						}
					}
				}
			);
			return this;
		}
})(jQuery);