(function($){
	$.fn.loading = function() {
		$(this).append("<div class='loading'></div>");
		$(this).find(".loading").html("<img src='images/loading.gif'/>");
	};
	
	$.fn.loadingreplace = function() {
		$(this).html("<div class='loading'></div>");
		$(this).find(".loading").html("<img src='images/loading.gif'/>");
	};
	
	$.fn.loadinglireplace = function() {
		var li = $("<li/>");
		var img = $("<img/>");
		img.attr({src:"images/loading.gif"});
		li.css("text-align","center");
		li.append(img);
		$(this).html(li);
		//$(this).find(".loading").html("<img src='images/loading.gif'/>");
	};
	
	
	$.fn.setTitle = function(title) {
		var mytitle = "Teacherlinx :: ";
		$(this).attr("title", mytitle + title);
	};
})(jQuery);



function in_array (needle, haystack, argStrict) {

    var key = '',
        strict = !! argStrict;

    if (strict) {
        for (key in haystack) {
            if (haystack[key] === needle) {
                return true;
            }
        }
    } else {
        for (key in haystack) {
            if (haystack[key] == needle) {
                return true;
            }
        }
    }

    return false;
}

function urldecode (str) {
    return decodeURIComponent((str + '').replace(/\+/g, '%20'));
}

function nl2br (str, is_xhtml) {
    // http://kevin.vanzonneveld.net
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Philip Peterson
    // +   improved by: Onno Marsman
    // +   improved by: Atli Þór
    // +   bugfixed by: Onno Marsman
    // +      input by: Brett Zamir (http://brett-zamir.me)
    // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Brett Zamir (http://brett-zamir.me)
    // +   improved by: Maximusya
    // *     example 1: nl2br('Kevin\nvan\nZonneveld');
    // *     returns 1: 'Kevin<br />\nvan<br />\nZonneveld'
    // *     example 2: nl2br("\nOne\nTwo\n\nThree\n", false);
    // *     returns 2: '<br>\nOne<br>\nTwo<br>\n<br>\nThree<br>\n'
    // *     example 3: nl2br("\nOne\nTwo\n\nThree\n", true);
    // *     returns 3: '<br />\nOne<br />\nTwo<br />\n<br />\nThree<br />\n'
    var breakTag = (is_xhtml || typeof is_xhtml === 'undefined') ? '<br />' : '<br>';

    return (str + '').replace(/([^>\r\n]?)(\r\n|\n\r|\r|\n)/g, '$1' + breakTag + '$2');
}

jQuery.fn.makeacolumnlists = function(settings){
	settings = jQuery.extend({
		cols: 2,				// set number of columns
		colWidth: 0,			// set width for each column or leave 0 for auto width
		equalHeight: false, 	// can be false, 'ul', 'ol', 'li'
		startN: 1				// first number on your ordered list
	}, settings);

	if(jQuery('> li', this)) {
		this.each(function(y) {
			var y=jQuery('.li_container').size(),
		    	height = 0, 
		        maxHeight = 0,
				t = jQuery(this),
				classN = t.attr('class'),
				listsize = jQuery('> li', this).size(),
				percol = Math.ceil(listsize/settings.cols),
				contW = t.width(),
				bl = ( isNaN(parseInt(t.css('borderLeftWidth'),10)) ? 0 : parseInt(t.css('borderLeftWidth'),10) ),
				br = ( isNaN(parseInt(t.css('borderRightWidth'),10)) ? 0 : parseInt(t.css('borderRightWidth'),10) ),
				pl = parseInt(t.css('paddingLeft'),10),
				pr = parseInt(t.css('paddingRight'),10),
				ml = parseInt(t.css('marginLeft'),10),
				mr = parseInt(t.css('marginRight'),10),
				col_Width = Math.floor((contW - (settings.cols-1)*(bl+br+pl+pr+ml+mr))/settings.cols);
			if (settings.colWidth) {
				col_Width = settings.colWidth; 
			}
			var colnum=1,
				percol2=percol;
			jQuery(this).addClass('li_cont1').wrap('<div id="li_container' + (++y) + '" class="li_container"></div>');
			for (var i=0; i<=listsize; i++) {
				if(i>=percol2) { percol2+=percol; colnum++; }
				var eq = jQuery('> li:eq('+i+')',this);
				eq.addClass('li_col'+ colnum);
				if(jQuery(this).is('ol')){eq.attr('value', ''+(i+settings.startN))+'';}
			}
			jQuery(this).css({cssFloat:'left', width:''+col_Width+'px'});
			for (colnum=2; colnum<=settings.cols; colnum++) {
				if(jQuery(this).is('ol')) {
					jQuery('li.li_col'+ colnum, this).appendTo('#li_container' + y).wrapAll('<ol class="li_cont'+colnum +' ' + classN + '" style="float:left; width: '+col_Width+'px;"></ol>');
				} else {
					jQuery('li.li_col'+ colnum, this).appendTo('#li_container' + y).wrapAll('<ul class="li_cont'+colnum +' ' + classN + '" style="float:left; width: '+col_Width+'px;"></ul>');
				}
			}
			if (settings.equalHeight=='li') {
				for (colnum=1; colnum<=settings.cols; colnum++) {
				    jQuery('#li_container'+ y +' li').each(function() {
				        var e = jQuery(this);
				        var border_top = ( isNaN(parseInt(e.css('borderTopWidth'),10)) ? 0 : parseInt(e.css('borderTopWidth'),10) );
				        var border_bottom = ( isNaN(parseInt(e.css('borderBottomWidth'),10)) ? 0 : parseInt(e.css('borderBottomWidth'),10) );
				        height = e.height() + parseInt(e.css('paddingTop'), 10) + parseInt(e.css('paddingBottom'), 10) + border_top + border_bottom;
				        maxHeight = (height > maxHeight) ? height : maxHeight;
				    });
				}
				for (colnum=1; colnum<=settings.cols; colnum++) {
					var eh = jQuery('#li_container'+ y +' li');
			        var border_top = ( isNaN(parseInt(eh.css('borderTopWidth'),10)) ? 0 : parseInt(eh.css('borderTopWidth'),10) );
			        var border_bottom = ( isNaN(parseInt(eh.css('borderBottomWidth'),10)) ? 0 : parseInt(eh.css('borderBottomWidth'),10) );
					mh = maxHeight - (parseInt(eh.css('paddingTop'), 10) + parseInt(eh.css('paddingBottom'), 10) + border_top + border_bottom );
			        eh.height(mh);
				}
			} else 
			if (settings.equalHeight=='ul' || settings.equalHeight=='ol') {
				for (colnum=1; colnum<=settings.cols; colnum++) {
				    jQuery('#li_container'+ y +' .li_cont'+colnum).each(function() {
				        var e = jQuery(this);
				        var border_top = ( isNaN(parseInt(e.css('borderTopWidth'),10)) ? 0 : parseInt(e.css('borderTopWidth'),10) );
				        var border_bottom = ( isNaN(parseInt(e.css('borderBottomWidth'),10)) ? 0 : parseInt(e.css('borderBottomWidth'),10) );
				        height = e.height() + parseInt(e.css('paddingTop'), 10) + parseInt(e.css('paddingBottom'), 10) + border_top + border_bottom;
				        maxHeight = (height > maxHeight) ? height : maxHeight;
				    });
				}
				for (colnum=1; colnum<=settings.cols; colnum++) {
					var eh = jQuery('#li_container'+ y +' .li_cont'+colnum);
			        var border_top = ( isNaN(parseInt(eh.css('borderTopWidth'),10)) ? 0 : parseInt(eh.css('borderTopWidth'),10) );
			        var border_bottom = ( isNaN(parseInt(eh.css('borderBottomWidth'),10)) ? 0 : parseInt(eh.css('borderBottomWidth'),10) );
					mh = maxHeight - (parseInt(eh.css('paddingTop'), 10) + parseInt(eh.css('paddingBottom'), 10) + border_top + border_bottom );
			        eh.height(mh);
				}
			}
		    jQuery('#li_container' + y).append('<div style="clear:both; overflow:hidden; height:0px;"></div>');
		});
	}
}

function isValidURL(url) {
	var RegExp = /(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/;

	if (RegExp.test(url)) {
		return true;
	} else {
		return false;
	}
}

function stripslashes (str) {
    return (str + '').replace(/\\(.?)/g, function (s, n1) {
        switch (n1) {
        case '\\':
            return '\\';
        case '0':
            return '\u0000';
        case '':
            return '';
        default:
            return n1;
        }
    });
}

function str_replace (search, replace, subject, count) {
    // http://kevin.vanzonneveld.net
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Gabriel Paderni
    // +   improved by: Philip Peterson
    // +   improved by: Simon Willison (http://simonwillison.net)
    // +    revised by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
    // +   bugfixed by: Anton Ongson
    // +      input by: Onno Marsman
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +    tweaked by: Onno Marsman
    // +      input by: Brett Zamir (http://brett-zamir.me)
    // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   input by: Oleg Eremeev
    // +   improved by: Brett Zamir (http://brett-zamir.me)
    // +   bugfixed by: Oleg Eremeev
    // %          note 1: The count parameter must be passed as a string in order
    // %          note 1:  to find a global variable in which the result will be given
    // *     example 1: str_replace(' ', '.', 'Kevin van Zonneveld');
    // *     returns 1: 'Kevin.van.Zonneveld'
    // *     example 2: str_replace(['{name}', 'l'], ['hello', 'm'], '{name}, lars');
    // *     returns 2: 'hemmo, mars'
    var i = 0,
        j = 0,
        temp = '',
        repl = '',
        sl = 0,
        fl = 0,
        f = [].concat(search),
        r = [].concat(replace),
        s = subject,
        ra = Object.prototype.toString.call(r) === '[object Array]',
        sa = Object.prototype.toString.call(s) === '[object Array]';
    s = [].concat(s);
    if (count) {
        this.window[count] = 0;
    }

    for (i = 0, sl = s.length; i < sl; i++) {
        if (s[i] === '') {
            continue;
        }
        for (j = 0, fl = f.length; j < fl; j++) {
            temp = s[i] + '';
            repl = ra ? (r[j] !== undefined ? r[j] : '') : r[0];
            s[i] = (temp).split(f[j]).join(repl);
            if (count && s[i] !== temp) {
                this.window[count] += (temp.length - s[i].length) / f[j].length;
            }
        }
    }
    return sa ? s : s[0];
}

(function($){$.fn.hoverIntent=function(f,g){var cfg={sensitivity:7,interval:100,timeout:0};cfg=$.extend(cfg,g?{over:f,out:g}:f);var cX,cY,pX,pY;var track=function(ev){cX=ev.pageX;cY=ev.pageY};var compare=function(ev,ob){ob.hoverIntent_t=clearTimeout(ob.hoverIntent_t);if((Math.abs(pX-cX)+Math.abs(pY-cY))<cfg.sensitivity){$(ob).unbind("mousemove",track);ob.hoverIntent_s=1;return cfg.over.apply(ob,[ev])}else{pX=cX;pY=cY;ob.hoverIntent_t=setTimeout(function(){compare(ev,ob)},cfg.interval)}};var delay=function(ev,ob){ob.hoverIntent_t=clearTimeout(ob.hoverIntent_t);ob.hoverIntent_s=0;return cfg.out.apply(ob,[ev])};var handleHover=function(e){var ev=jQuery.extend({},e);var ob=this;if(ob.hoverIntent_t){ob.hoverIntent_t=clearTimeout(ob.hoverIntent_t)}if(e.type=="mouseenter"){pX=ev.pageX;pY=ev.pageY;$(ob).bind("mousemove",track);if(ob.hoverIntent_s!=1){ob.hoverIntent_t=setTimeout(function(){compare(ev,ob)},cfg.interval)}}else{$(ob).unbind("mousemove",track);if(ob.hoverIntent_s==1){ob.hoverIntent_t=setTimeout(function(){delay(ev,ob)},cfg.timeout)}}};return this.bind('mouseenter',handleHover).bind('mouseleave',handleHover)}})(jQuery);