// Math.random(): produces integer -> 0.473239055961688
// toString(): from integer to string -> '0.473239055961688'
// substring(2): extract after period -> '473239055961688'
var str=Math.random().toString().substring(2);
alert(str);

// https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Global_Objects/Math/random#Examples
function getRandomInt(min, max){
    return Math.floor(Math.random() * (max - min + 1)) + min;
}

// iframe killer
while ((el=document.getElementsByTagName('iframe')).length) {
    el[0].parentNode.removeChild(el[0]);
}

function dump(arr, level) {
    // dump() from openjs.com
    var dumped_text = "";
    if (!level) level = 0;
    var level_padding = "";
    for (var j = 0; j < level + 1; j++) level_padding += "    ";
    if (typeof(arr) == 'object') {
        for (var item in arr) {
            var value = arr[item];
            if (typeof(value) == 'object') {
                dumped_text += level_padding + "'" + item + "' ...\n";
                dumped_text += dump(value, level + 1);
            } else {
                dumped_text += level_padding + "'" + item + "' => \"" + value + "\"\n";
            }
        }
    } else {
        dumped_text = "===>" + arr + "<===(" + typeof(arr) + ")";
    }
    return dumped_text;
}
 
function dbg(msg, level) {
    msg = typeof(msg) === 'object' ? dump(msg, level) : msg;
    var $debugbox = $('#dbg');
    if (!($debugbox.length >= 1)) {
        $debugbox = $('<div id="dbg"></div>')
            .css({
                'bottom' : '0',
                'font-family' : 'monospace',
                'font-size' : '90%',
                'position' : 'absolute',
                'width' : '50%'
            });
        $debugbox.append(
            $('<div>').css({
                'border' : '3px solid black',
                'margin' : '10px 0',
                'max-height' : '200px',
                'overflow-y' : 'auto',
                'padding' : '8px'
            }));
        $("body").append($debugbox);
    }
 
    $debugbox
        .find("> div")
            .append($('<div>').append((new Date).getTime() + ' ' + msg));
 
    $debugbox
        .find("> div")
            .scrollTop($debugbox.find('> div').prop('scrollHeight'));
}

$(document).ready(function(){
    $('#mytextarea').keydown(
        function(e){
            if(this.setSelectionRange){
                var start=this.selectionStart,val=$(this).val();
                switch(e.keyCode){
                    case 9: /* tab */
                        $(this).val(val.substring(0,start)+'t'+val.substr(this.selectionEnd));
                        this.setSelectionRange(start+2,start+2);
                        this.focus();
                        e.preventDefault();
                        return false;
                        break;
                    case 13: /* enter */
                        var match=val.substring(0,start).match(/(^|n)([ t]*)([^n]*)$/);
                        if(match){
                            var spaces=match[2],length=spaces.length+1;
                            $(this).val(val.substring(0,start)+'n'+spaces+val.substr(this.selectionEnd));
                            this.setSelectionRange(start+length,start+length);
                            this.focus();
                            return false;
                        }
                        break;
                }
                return true;
            }
        }
    );
});

function interceptTabs(evt,control){
    key=evt.keyCode?evt.keyCode:evt.which?evt.which:evt.charCode;
    if(key==9){
        insertAtCursor(control,'t');
        return false;
    }
    else{
        return key;
    }
}
function insertAtCursor(myField, myValue){
    if(document.selection){
        /* ie */
        myField.focus();
        sel=document.selection.createRange();
        sel.text=myValue;
    }
    else if(myField.selectionStart||myField.selectionStart=='0'){
        /* mozilla support */
        var startPos=myField.selectionStart;
        var endPos=myField.selectionEnd;
        restoreTop=myField.scrollTop;
        myField.value=myField.value.substring(0,startPos)+myValue+myField.value.substring(endPos,myField.value.length);
        myField.selectionStart=startPos+myValue.length;
        myField.selectionEnd=startPos+myValue.length;
        if(restoreTop>0){
            myField.scrollTop=restoreTop;
        }
    }
    else{
        myField.value+=myValue;
    }
}

// snippet...
switch(e.keyCode){
    case 13:
        // code for ENTER
        break; // !important
    case 27:
        // code for ESC
        break; // !
}
return true;

var keyCodes = {
    BACKSPACE: 8,
    TAB: 9,
    ENTER: 13,
    ESC: 27,
    SPACE: 32,
    PAGE_UP: 33,
    PAGE_DOWN: 34,
    LEFT: 37,
    UP: 38,
    RIGHT: 39,
    DOWN: 40,
    DEL: 46
};

$("#search-input").keydown(function(event) {
    switch (event.keyCode) {
        case keyCodes.ENTER:
            event.preventDefault();
            var query = $("#search-input").val();
            ajaxSearch(query);
            break;
        default:
            break;
    }
});