function getE(name) {
    if (document.getElementById)
        var elem = document.getElementById(name);
    else if (document.all)
        var elem = document.all[name];
    else if (document.layers)
        var elem = document.layers[name];
    return elem;
}

function OpenWindow(query, w, h, scroll) {
    var l = (screen.width - w) / 2;
    var t = (screen.height - h) / 2;

    winprops = 'resizable=0, height=' + h + ',width=' + w + ',top=' + t + ',left=' + l + 'w';
    if (scroll) winprops += ',scrollbars=1';
    var f = window.open(query, "_blank", winprops);
}
function extractNumber(obj, decimalPlaces, allowNegative) {
    //            	debugger;
    var temp = obj.value;
    if (temp != null) {
        // avoid changing things if already formatted correctly
        var reg0Str = '[0-9]*';
        if (decimalPlaces > 0) {
            reg0Str += '\\.?[0-9]{0,' + decimalPlaces + '}';
        } else if (decimalPlaces < 0) {
            reg0Str += '\\.?[0-9]*';
        }
        reg0Str = allowNegative ? '^-?' + reg0Str : '^' + reg0Str;
        reg0Str = reg0Str + '$';
        var reg0 = new RegExp(reg0Str);
        if (reg0.test(temp)) return true;

        // first replace all non numbers
        var reg1Str = '[^0-9' + (decimalPlaces != 0 ? '.' : '')
     + (allowNegative ? '-' : '') + ']';
        var reg1 = new RegExp(reg1Str, 'g');
        temp = temp.replace(reg1, '');

        if (allowNegative) {
            // replace extra negative
            var hasNegative = temp.length > 0 && temp.charAt(0) == '-';
            var reg2 = /-/g;
            temp = temp.replace(reg2, '');
            if (hasNegative) temp = '-' + temp;
        }

        if (decimalPlaces != 0) {
            var reg3 = /\./g;
            var reg3Array = reg3.exec(temp);
            if (reg3Array != null) {
                // keep only first occurrence of . 
                //  and the number of places specified by decimalPlaces   or the entire string if decimalPlaces < 0
                var reg3Right = temp.substring(reg3Array.index + reg3Array[0].length);
                reg3Right = reg3Right.replace(reg3, '');
                reg3Right = decimalPlaces > 0 ? reg3Right.substring(0, decimalPlaces) : reg3Right;
                temp = temp.substring(0, reg3Array.index) + '.' + reg3Right;
            }
        }

        obj.value = temp;
    }
    }
function blockNonNumbers(obj, e, allowDecimal, allowNegative) {
    //                debugger;
    var key;
    var isCtrl = false;
    var keychar;
    var reg;

    if (window.event) {
        key = e.keyCode;
        isCtrl = window.event.ctrlKey
    }
    else if (e.which) {
        key = e.which;
        isCtrl = e.ctrlKey;
    }

    if (isNaN(key)) return true;

    keychar = String.fromCharCode(key);

    // check for backspace or delete, or if Ctrl was pressed
    if (key == 8 || isCtrl) {
        return true;
    }
    reg = /\d/;
    var isFirstN = allowNegative ? keychar == '-' && obj.value.indexOf('-') == -1 : false;
    var isFirstD = allowDecimal ? keychar == '.' && obj.value.indexOf('.') == -1 : false;

    return isFirstN || isFirstD || reg.test(keychar);
}