var firefox = document.getElementById && !document.all;

function getControl(ID) {
    return document.getElementById(ID)
}

function numericOnly(e) {

    var keycode = 0;

    if (!firefox) {
        keycode = window.event.keyCode;
    } else {
        keycode = e.charCode;
    }
    if (firefox && keycode == 0) {
        return true;
    }

    if (
	    keycode == 8 || //backspace
	    keycode == 127  //delete
	    )		// \
    {
        return true;
    }

    if (keycode < 48 || keycode > 57) {
        if (!firefox) {
            window.event.keyCode = 8;
        } else {
            return false;
        }
    }
}

function dayPhoneOnly(e, contact) {
    var blnIncorrectStart = false;
    var keycode = 0;

    if (!firefox) {
        keycode = window.event.keyCode;
    } else {
        keycode = e.charCode;
    }
    if (firefox && keycode == 0) {
        return true;
    }

    if (
	    keycode == 8 || //backspace
	    keycode == 127  //delete
	    )		// \
    {
        return true;
    }

    if (contact.length == 0) {
        if (keycode != 48) {
            blnIncorrectStart = true;
        }
    }

    if (blnIncorrectStart) {
        if (!firefox) {
            window.event.keyCode = 8;
        } else {
            return false;
        }
    }

    return numericOnly(e);
}

function mobilePhoneOnly(e, mobile) {
    var blnIncorrectStart = false;

    var keycode = 0;

    if (!firefox) {
        keycode = window.event.keyCode;
    } else {
        keycode = e.charCode;
    }
    if (firefox && keycode == 0) {
        return true;
    }

    if (
	    keycode == 8 || //backspace
	    keycode == 127  //delete
	    )		// \
    {
        return true;
    }

    if (mobile.length == 0) {
        if (keycode != 48) {
            blnIncorrectStart = true;
        }
    }
    if (mobile.length == 1) {
        if (keycode != 52) {
            blnIncorrectStart = true;
        }
    }
    if (blnIncorrectStart) {
        if (!firefox) {
            window.event.keyCode = 8;
        } else {
            return false;
        }
    }

    numericOnly(e);
}

function mobilePhoneNZOnly(e, mobile) {
    var blnIncorrectStart = false;

    var keycode = 0;

    if (!firefox) {
        keycode = window.event.keyCode;
    } else {
        keycode = e.charCode;
    }
    if (firefox && keycode == 0) {
        return true;
    }

    if (
	    keycode == 8 || //backspace
	    keycode == 127  //delete
	    )		// \
    {
        return true;
    }

    if (mobile.length == 0) {
        if (keycode != 48) {
            blnIncorrectStart = true;
        }
    }
    //    if (mobile.length == 1) {
    //        if (keycode != 52) {
    //            blnIncorrectStart = true;
    //        }
    //    }
    if (blnIncorrectStart) {
        if (!firefox) {
            window.event.keyCode = 8;
        } else {
            return false;
        }
    }

    numericOnly(e);
}

function alphaOnly(e) {
    var keycode = 0;

    if (!firefox) {
        keycode = window.event.keyCode;
    } else {
        keycode = e.charCode;
    }

    if (firefox && keycode == 0) {
        return true;
    }

    if (
	    keycode == 8 || //backspace
	    keycode == 127 || //delete
	    keycode == 32 || // space
		keycode == 39 || // '
		keycode == 45 || // -
		keycode == 92 || // /
		keycode == 47)		// \
    {
        return true;
    }

    if ((keycode < 65 || keycode > 90) && (keycode < 97 || keycode > 122)) {
        if (!firefox) {
            window.event.keyCode = 8;
        } else {
            return false;
        }
        //window.event.cancelBubble = true;
    }
}

function alphaNumericOnly(e) {
    var keycode = 0;

    if (!firefox) {
        keycode = window.event.keyCode;
    } else {
        keycode = e.charCode;
    }

    if (firefox && keycode == 0) {
        return true;
    }

    if (keycode == 32) { //space bar
        return true;
    }

    if (
	    keycode == 8 || //backspace
	    keycode == 127  //delete
	    )		// \
    {
        return true;
    }

    if (keycode == 45 || // -
		keycode == 44 || // ,
		keycode == 47 || // \
		keycode == 92 || // /
		keycode == 39)		// '
    {
        return true;
    }

    if ((keycode < 65 || keycode > 90) && (keycode < 97 || keycode > 122) && (keycode < 48 || keycode > 57)) {
        if (!firefox) {
            window.event.keyCode = 8;
        } else {
            return false;
        }
        //window.event.cancelBubble = true;
    }
}

function currencyOnly(keycode) {

    if (keycode == 46) { // period
        return true;
    }

    if (firefox && keycode == 0) {
        return true;
    }

    if (
	    keycode == 8 || //backspace
	    keycode == 127  //delete
	    )		// \
    {
        return true;
    }

    if (keycode < 48 || keycode > 57) {
        return false;
    }
    return true;
}

function currencyOnly(e) {

    var keycode = e.keyCode;
    
    if (keycode == 46) { // period
        return true;
    }

    if (firefox && keycode == 0) {
        return true;
    }

    if (
	    keycode == 8 || //backspace
	    keycode == 127  //delete
	    )		// \
    {
        return true;
    }

    if (keycode < 48 || keycode > 57) {
        return false;
    }
    return true;
}

function checkPurchaseAmount(e) {

    var keycode = 0;

    if (!firefox) {
        keycode = window.event.keyCode;
    } else {
        keycode = e.charCode;
    }

    if (!currencyOnly(keycode)) {
        if (!firefox) {
            window.event.keyCode = 8;
            return false;
        } else {
            return false;
        }
    }



    var xx = document.getElementById("form1");
    var val = xx.purchaseamount.value

    var len = val.length;

    if (len == 4 && val.indexOf(".") < 0 && keycode != 46) {
        if (!firefox) {
            window.event.keyCode = 8;
            return false;
        } else {
            return false;
        }
    }

    if (val.indexOf(".") > -1 && val.indexOf(".") == val.length - 3) {
        if (!firefox) {
            window.event.keyCode = 8;
            return false;
        } else {
            return false;
        }
    }

}

function emailCharsOnly(e) {
    var keycode = 0;

    if (!firefox) {
        keycode = window.event.keyCode;
    } else {
        keycode = e.charCode;
    }

    if (firefox && keycode == 0) {
        return true;
    }

    //alert(keycode);
    //period               @             _
    if (keycode == 45 || keycode == 46 || keycode == 64 || keycode == 95) { //.@_
        return true;
    }

    if ((keycode < 48 || keycode > 57) && (keycode < 65 || keycode > 90) && (keycode < 97 || keycode > 122)) {
        if (!firefox) {
            window.event.keyCode = 8;
        } else {
            return false;
        }
        //window.event.cancelBubble = true;
    }
}

function checkLength(e, len) {
    var obj
    if (!firefox) {
        obj = window.event.srcElement;
    } else {
        obj = e.target;
    }
    if (obj.value == "") { return; }

    if (obj.value.length < len) {
        alert("Please make sure this field is " + len + " numbers long");
        obj.focus();
    }
}


function extractNumber(obj, decimalPlaces, allowNegative) {
    var temp = obj.value;

    // 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) {
    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);
}