function showHide() { /* toggle element display */

    var text = document.getElementById("full-text");
    var link = document.getElementById("expand-text-link");
    
    if(text.style.display == "block" || text.style.display == ""){
        text.style.display = "none";
    }else{
        text.style.display = "block";
        link.style.display = "none";
    }
} //END showHide


/* document switching */

function showdoc()

{

    var dprev = document.getElementById("preview");

    var dfull = document.getElementById("full");

    dprev.className = "hide";

    dfull.className = "show";

}

function hidedoc() 

{

    var dprev = document.getElementById("preview");

    var dfull = document.getElementById("full");

    dprev.className = "show";

    dfull.className = "hide";

}


function bcExpand() {
    var collapsable = document.getElementById('bccollapsable');
    var bcbutton = document.getElementById('bcexpandimg');
    if (null != collapsable && null != bcbutton) {
        collapsable.style.display = 'inline';
        bcbutton.style.display = 'none';
    }
}

function bcCollapse() {
    var collapsable = document.getElementById('bccollapsable');
    var bcbutton = document.getElementById('bcexpandimg');
    if (null != collapsable && null != bcbutton) {
        collapsable.style.display = 'none';
        bcbutton.style.display = 'inline';
    }
}