site.core.js

/*

site.core.js
Collection of useful scripts.

Change log:
Created:    Thursday March 17,2011 5:04 PM

*/
String.prototype.add = function (A) {
    return this + A
};
String.prototype.trim = function () {
    return this.replace(/^\s+|\s+$/g, "")
};
String.prototype.truncWithEllipis = function (B) {
    var A = this.trim();
    return [A.substring(0, B), "..."].join("")
};
String.prototype.stripHTML = function () {
    return this.replace(/(<([^>]+)>)/ig, "")
};


// Popup window function
function basicPopup(url) {
    popupWindow = window.open(url, 'popUpWindow', 'height=500,width=500,left=100,top=100,resizable=yes,scrollbars=yes,toolbar=yes,menubar=no,location=no,directories=no, status=yes');
}

//positionedPopup(this.href,'myWindow','500','300','100','200','yes')
var popupWindowpositioned = null;
function positionedPopup(url, winName, w, h, t, l, scroll) {
    settings =
    'height=' + h + ',width=' + w + ',top=' + t + ',left=' + l + ',scrollbars=' + scroll + ',resizable'
    popupWindowpositioned = window.open(url, winName, settings)
}

//centeredPopup(this.href,'myWindow','500','300','yes');
function centeredPopup(url, winName, w, h, scroll) {
    LeftPosition = (screen.width) ? (screen.width - w) / 2 : 0;
    TopPosition = (screen.height) ? (screen.height - h) / 2 : 0;
    settings =
    'height=' + h + ',width=' + w + ',top=' + TopPosition + ',left=' + LeftPosition + ',scrollbars=' + scroll + ',resizable'
    return window.open(url, winName, settings)
}

function getRandom() {
    var result, i, j;
    result = '';
    for (j = 0; j < 32; j++) {
        if (j == 8 || j == 12 || j == 16 || j == 20) result = result + '-';
        i = Math.floor(Math.random() * 16).toString(16).toUpperCase();
        result = result + i;
    }
    return result
}

function zulu_date(c) {
    var b = new Date(c),
        a = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
    return b.getDate() + " " + a[b.getUTCMonth()] + " " + String(b.getUTCFullYear()).slice(-2) + " " + ("00" + b.getUTCHours()).slice(-2) + ":" + ("00" + b.getUTCMinutes()).slice(-2) + "Z"
};

function createXmlHttp() {

    var xmlHttp = null;
    if (typeof XMLHttpRequest != "undefined") {
        xmlHttp = new XMLHttpRequest();
    }
    else if (typeof window.ActiveXObject != "undefined") {
        try {
            xmlHttp = new ActiveXObject("Msxml2.XMLHTTP.4.0");
        }
        catch (e) {
            try {
                xmlHttp = new ActiveXObject("MSXML2.XMLHTTP");
            }
            catch (e) {
                try {
                    xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
                }
                catch (e) {
                    xmlHttp = null;
                }
            }
        }
    }
    return xmlHttp;
}

/*is_number Return true if a value represents a number, else return false.*/
function is_number(value) {
    var str = value + "";
    return str.match(/^-?\d*\.?\d+$/) ? true : false;
}

/* is_blank Return true if value is a blank (i.e. "").*/
function is_blank(value) {
    var str = value + "";
    return str.match(/^\s*$/) ? true : false;
}

/*trim_string Remove leading and trailing blank spaces from a string. */
function trim_string(str) {
    var trim = str + "";
    trim = trim.replace(/^\s*/, "");
    return trim.replace(/\s*$/, "");
}

/* are_values_equal()
*   Compare values of types boolean, string and number. The types may be different.
*   Returns true if values are equal */
function are_values_equal(val1, val2) {
    /* Make sure we can handle these values. */
    switch (typeof (val1)) {
        case 'boolean':
        case 'string':
        case 'number':
            break;
        default:
            // alert("are_values_equal does not handle the type '" + typeof(val1) + "' of val1 '" + val1 + "'.");
            return false;
    }

    switch (typeof (val2)) {
        case 'boolean':
            switch (typeof (val1)) {
                case 'boolean':
                    return (val1 == val2);
                case 'string':
                    if (val2) {
                        return (val1 == "1" || val1.toLowerCase() == "true" || val1.toLowerCase() == "on");
                    } else {
                        return (val1 == "0" || val1.toLowerCase() == "false" || val1.toLowerCase() == "off");
                    }
                    break;
                case 'number':
                    return (val1 == val2 * 1);
            }
            break;
        case 'string':
            switch (typeof (val1)) {
                case 'boolean':
                    if (val1) {
                        return (val2 == "1" || val2.toLowerCase() == "true" || val2.toLowerCase() == "on");
                    } else {
                        return (val2 == "0" || val2.toLowerCase() == "false" || val2.toLowerCase() == "off");
                    }
                    break;
                case 'string':
                    if (val2 == "1" || val2.toLowerCase() == "true" || val2.toLowerCase() == "on") {
                        return (val1 == "1" || val1.toLowerCase() == "true" || val1.toLowerCase() == "on");
                    }
                    if (val2 == "0" || val2.toLowerCase() == "false" || val2.toLowerCase() == "off") {
                        return (val1 == "0" || val1.toLowerCase() == "false" || val1.toLowerCase() == "off");
                    }
                    return (val2 == val1);
                case 'number':
                    if (val2 == "1" || val2.toLowerCase() == "true" || val2.toLowerCase() == "on") {
                        return (val1 == 1);
                    }
                    if (val2 == "0" || val2.toLowerCase() == "false" || val2.toLowerCase() == "off") {
                        return (val1 === 0);
                    }
                    return (val2 == val1 + "");
            }
            break;
        case 'number':
            switch (typeof (val1)) {
                case 'boolean':
                    return (val1 * 1 == val2);
                case 'string':
                    if (val1 == "1" || val1.toLowerCase() == "true" || val1.toLowerCase() == "on") {
                        return (val2 == 1);
                    }
                    if (val1 == "0" || val1.toLowerCase() == "false" || val1.toLowerCase() == "off") {
                        return (val2 === 0);
                    }
                    return (val1 == val2 + "");
                case 'number':
                    return (val2 == val1);
            }
            break;
        default:
            return false;
    }
}

/*
* copy_select_options(from_select, to_select )
*   copy options from the given select element. Do not copy the first option which is the descriptive
*      label such as <option value="-1">Computer Name</option>
*
* NOTE: Attempts to preserve the current selection, or reverts to "-1" if the selection has disappeared.
*/
function copy_select_options(from_select, to_select) {
    /*
    * Disable the select element so that it does not conflict with any user-interaction
    */
    var saved_state = to_select.disabled;

    if (!saved_state) {
        to_select.disabled = true;
    }

    /*
    * Remember the selection value of this pulldown, if any
    */
    var current_value_selection = null;
    if (to_select.selectedIndex) {
        var current_selected_index = to_select.selectedIndex;
        current_value_selection = to_select.value;
    } else {
        current_value_selection = "-1";
    }

    /*
    * Clear the select options as we are now going to refresh the list
    *   Keep the descriptive label
    */
    for (var k = to_select.options.length - 1; k > 0; k--) {
        to_select.options[k] = null;
    }

    /*
    * Copy options from the new select
    *   Don't touch the descriptive label, start from entry 1
    *   opt.text = "Computer Name"; opt.value = "-1";
    */
    var selected_index = 0;
    for (var entry = 1; entry < from_select.options.length; ++entry) {
        to_select.options.add(new Option(from_select.options[entry].text, from_select.options[entry].value));

        /*
        * If the previously selected value matches this entry then we remeber the
        * index of it so that we can restore the selected position
        */
        if (from_select.options[entry].value == current_value_selection) {
            selected_index = entry;
        }
    }

    /*
    * Restore the selected position
    */
    to_select.selectedIndex = selected_index;

    /*
    * Re-enable the select element
    */
    to_select.disabled = saved_state;
}