function firstFocus() {
    if (document.forms.length > 0) {
        var field = document.forms[0];

        for (i = 0; i < field.length; i++) {
            if ((field.elements[i].type == "text") || (field.elements[i].type == "textarea") || (field.elements[i].type.toString().charAt(0) == "s")) {
                document.forms[0].elements[i].focus();
                break;
            }
        }
    }
}

function print_article(article_id) {
    window.open('print.php?articleId=' + article_id,'','left=20,top=20,toolbar=1,resizable=0,scrollbars=1,menubar=1');
}

function showOverlay() {
	el = document.getElementById("overlay");
	el.style.visibility = (el.style.visibility == "visible") ? "hidden" : "visible";
	
	el = document.getElementById("overlay_msg");
	el.style.visibility = (el.style.visibility == "visible") ? "hidden" : "visible";
}

function toggleDiv(divId) {
	d = document.getElementById(divId);	
	d.style.display = (d.style.display == "none") ? "block" : "none";
}
function viewPreview(div) {
	a = document.getElementById('abstract');
	b = document.getElementById('body');
	
	if (div == 'abstract') {
		a.style.display = "block";
		b.style.display = "none";
	} else {
		b.style.display = "block";
		a.style.display = "none";
	}
}

function swapTree(image_id) {
	
	i = document.getElementById(image_id);
	
	if (i.innerHTML == '<img src="images/tree_open.gif">')
		i.innerHTML = '<img src="images/tree_closed.gif">';
	else
		i.innerHTML = '<img src="images/tree_open.gif">';
	
}

function submitDeleteForm() {
	if (confirm('Are you sure you want to delete this item?'))
		document.frmDelete.submit();
}

function disableEventTime() {

	st = document.getElementById("strStartTime");
	et = document.getElementById("strEndTime");
	val = document.getElementById("blnIsAllDay");
	
	st.disabled = val.checked;
	et.disabled = val.checked;
	
	if (val.checked == true) {
		st.value = '';
		et.value = '';
	}
}