/** ************************************************\
**  Developed by Huy Van hvan021@gmail.com        ***
**  Please retain this information for free use   ***
**  If you encounter any error please contact me  ***
**  at the email address above. This script uses  ***
**  the function getElementsByClassName()         ***
**  from Jonathan Snoook and Robert Nyman         ***
**  Please retain all information                 ***
\***************************************************/

function showHideElement(elementID) {   
    hideElement("intro"); 
    //hide all category detailed contents
    var elementList = getElementsByClassName(document,"div", "news");
    for (var i = 0; i< elementList.length; i++){
        elementList[i].style.display = 'none';
    }
    var activeElem = document.getElementById(elementID);
    activeElem.style.display = 'block';
}


function hideElement(elementID){
     document.getElementById(elementID).style.display = 'none';
}

function showAllElementWithSameClass(elementClassName){
    var elementList = getElementsByClassName(document,"div",elementClassName);
    for (var i = 0; i< elementList.length; i++){
        elementList[i].style.display = 'block';
    }
}

/*
    The below function is 
    Written by Jonathan Snook, http://www.snook.ca/jonathan
    Add-ons by Robert Nyman, http://www.robertnyman.com
*/
function getElementsByClassName(oElm, strTagName, strClassName){
    var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
    var arrReturnElements = new Array();
    strClassName = strClassName.replace(/\-/g, "\\-");
    var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
    var oElement;
    for(var i=0; i<arrElements.length; i++){
        oElement = arrElements[i];      
        if(oRegExp.test(oElement.className)){
            arrReturnElements.push(oElement);
        }
    }
    return (arrReturnElements);
}

/*


To get all a elements in the document with a “info-links” class.
    getElementsByClassName(document, "a", "info-links");
To get all div elements within the element named “container”, with a “col” class.
    getElementsByClassName(document.getElementById("container"), "div", "col"); 
To get all elements within in the document with a “click-me” class.
    getElementsByClassName(document, "*", "click-me"); 

*/


function printDate(){
    var dayNames = new Array("Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday");
    var monthNames = new Array("January","February","March","April","May","June","July",
                               "August","September","October","November","December");
    var dt = new Date();
    var y  = dt.getYear();
    // Y2K compliant
    if (y < 1000) y +=1900;
    //return "test";
    //return (dayNames[dt.getDay()] + ", " + monthNames[dt.getMonth()] + " " + dt.getDate() + ", " + y);
    document.write(dayNames[dt.getDay()] + ", " + monthNames[dt.getMonth()] + " " + dt.getDate() + ", " + y);
    //document.getElementById("datetime").value = (dayNames[dt.getDay()] + ", " + monthNames[dt.getMonth()] + " " + dt.getDate() + ", " + y);
}