//The following functions are for the left navagation menu on the webpages.
function menuDefault(obj) {
    document.getElementById(obj).className = 'dMenuDefault';
}

function menuHighLight(obj) {
    document.getElementById(obj).className = 'dMenuHighLight';
}

//The following functions and variables are for the drop down menu on the top of the page after the 
//user accepts the terms of the website.
var timeout = 500;
var closetimer = 0;
var ddmenuitem = 0;

// open hidden layer
function mopen(id) {
    // cancel close timer
    mcancelclosetime();

    // close old layer
    if (ddmenuitem) ddmenuitem.style.visibility = 'hidden';

    // get new layer and show it
    ddmenuitem = document.getElementById(id);
    ddmenuitem.style.visibility = 'visible';

}

// close showed layer
function mclose() {
    if (ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}

// go close timer
function mclosetime() {
    closetimer = window.setTimeout(mclose, timeout);
}

// cancel close timer
function mcancelclosetime() {
    if (closetimer) {
        window.clearTimeout(closetimer);
        closetimer = null;
    }
}
function checkSpecChars(e) {
    var codeVal = (window.event) ? event.keyCode : e.keyCode;
    if ((codeVal >= 48) && (codeVal <= 57)) {
        event.returnValue = true;
    } else if ((codeVal >= 65) && (codeVal <= 90)) {
        event.returnValue = true;
    } else if (codeVal == 32) {
        event.returnValue = true;
    } else if (codeVal == 45) {
        event.returnValue = true;
    } else if (codeVal == 39) {
        event.returnValue = true;
    } else if ((codeVal >= 97) && (codeVal <= 122)) {
        event.returnValue = true;
    } else {
        event.returnValue = false
    }
}