// jump menu

function MM_jumpMenu(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}

// rollover scripts

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}


/// subnav
function setSubNav( navpart )
{
        if ( document.getElementById(navpart+'_subnav') ) {
                document.getElementById('subnavbar').innerHTML = document.getElementById(navpart+'_subnav').innerHTML;
        }
        else {
                document.getElementById('subnavbar').innerHTML = '';
        }
}

////////////////////////////////////
// email popup

function email_page(data)
{
	emailWindow = window.open('/common/emailarticle.php?' + data, 'email_window', 'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width=512,height=430');
}

////////////////////////////////////
// printer-friendly version popup

function print_page(url)
{
	var opts = 'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width=536,height=500';
	if ( url.substring(0, 10) == '/articles/' ) {
		printWindow = window.open(url + '?printbtn=Print+This+Window', 'print_window', opts);
	}
	else {
		printWindow = window.open(url, 'print_window', opts);
	}
}

function checkEmailForm(theForm)
{
	var TO		= theForm.TO.value;
	var FROM	= theForm.FROM.value;
	var BCC		= theForm.BCC.value;
	var regExp	= /[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,6})/; // email validator

	toValid =	TO.search(regExp);
	fromValid =	FROM.search(regExp);
	bccValid =	BCC.search(regExp);

	if (TO == "") {
		theForm.TO.focus();
		alert("You must first enter the email address of the person \rto whom you would like to send this article.");
		return false;
	} else if (toValid == -1) {
		theForm.TO.focus();
		alert("You must first enter a valid email address in the \"To\" field.");
		return false;
	} else if (FROM == "") {
		theForm.FROM.focus();
		alert("You must first enter your email address in the \"Your Email Address\" field.");
		return false;
	} else if (fromValid == -1) {
		theForm.FROM.focus();
		alert("You must first enter a valid email address in the \"Your Email Address\" field.");
		return false;
	} else if (BCC != "" && bccValid == -1) {
		theForm.BCC.focus();
		alert("You must first enter a valid email address in the \"Bcc\" field.");
		return false;
	}
	return true;
}

////////////////////////////////////
// font-sizing

var factor = 1;
var isIE = (navigator.appName == 'Microsoft Internet Explorer');

function setElement(obj, addl)
{
	if (obj.style && ( obj.nodeType == 1 || obj.nodeType == 3 ) ) {
		if ( isIE )
			z = obj.currentStyle;
		else
			z = window.getComputedStyle(obj,null);
		newFsize = (parseInt(z.fontSize)+addl)+'px';
		newLsize = (parseInt(z.lineHeight)+addl)+'px';
		obj.style.fontSize = newFsize;
		obj.style.lineHeight = newLsize;
		for (var y=0; y<obj.childNodes.length; y++)
			setElement(obj.childNodes[y], addl); // recursive
	}
}

function changeSize(opt)
{
	var head = document.getElementById('storyheader');
	var block = document.getElementById('storybody');
	var addl = 0;

	if (opt=='inc' && factor < 8) {
		addl = 3;
		factor++;
	}
	else if (opt=='dec' && factor > 1) {
		addl = -3;
		factor--;
	}
	else if (factor == 1)
		return;

	setElement(head,addl);
	setElement(block,addl);
}

////////////////////////////////////
// Custom Scrolling

var defaultStep=2;
var timerDown="";
var timerUp="";

function scrollDivDown(id){
	clearTimeout(timerDown);
	document.getElementById(id).scrollTop+=defaultStep;
	timerDown=setTimeout("scrollDivDown('"+id+"')",10);
}

function scrollDivUp(id){
	clearTimeout(timerUp);
	document.getElementById(id).scrollTop-=defaultStep;
	timerUp=setTimeout("scrollDivUp('"+id+"')",10);
}

function stopMe(){
	clearTimeout(timerDown);
	clearTimeout(timerUp);
}

////////////////////////////////////
// Story Toolbox

function set_tabs(id)
{
	for (var i in storytabs) {
		if (storytabs[i]==id) {
			document.getElementById('tab'+storytabs[i]).className = 'current';
			document.getElementById('block'+storytabs[i]).style.display = 'block';
		}
		else {
			document.getElementById('tab'+storytabs[i]).className = 'NULL';
			document.getElementById('block'+storytabs[i]).style.display = 'none';
		}
	}
}

function process_email(theForm)
{
	checkEmailForm(theForm);
	callACAC('/common/emailarticle.php', getPOSTParams(theForm), 'block1', 'POST');
	emailref = true;
}

function get_tab(id)
{
	set_tabs(id);
	switch (id) {
		case '1': // email
			if (emailref == true) {
				callACAC('/common/emailarticle.php', 'data=' + emailvals, 'block1');
				emailref = false;
			}
			break;
		case '2':  // comments
			if (commref == true) {
				getCommentForm(rurl, iid);
				commref = false;
			}
			break;
		case '3': // print
			window.frames['printwin'].location = printurl;
			window.frames['printwin'].focus();
			window.frames['printwin'].print();
			break;
		case '4': // reuse
			break; // just switch tab
		case '5': // sharing
			break; // just switch tab
		case '6': // rss
			break; // just switch tab
	}
}


////////////////////////////////////
// Ajax Functions

function XHR()
{
	try {
		obj = new XMLHttpRequest(); /* e.g. Firefox */
	} catch(e) {
		try {
			obj = new ActiveXObject("Msxml2.XMLHTTP");  /* some versions IE */
		} catch (e) {
			try {
				obj = new ActiveXObject("Microsoft.XMLHTTP");  /* some versions IE */
			} catch (E) {
				obj = false;
			}
		}
	}
	return obj;
}

function SetDiv(obj)
{
	if(obj.req.readyState == 4) {
		if(obj.req.status == 200) {
			obj.div.innerHTML = obj.req.responseText;
		} else {
			if (err_msg)
				obj.div.innerHTML = err_msg+"\n"+obj.req.responseText;
		}
	}
}

function AlertResult(obj)
{
	if(obj.req.readyState == 4)
		if (obj.req.status == 200)
			alert(obj.req.responseText); // what to do as a result
}

function AjaxGet(urlstr, div)
{
	this.div = document.getElementById(div);
	if (arguments[2])
		this.div.innerHTML = arguments[2];
	this.req = XHR(); // OK
	this.req.open('GET', urlstr, true);
	var obj = this;
	this.req.onreadystatechange = function() { SetDiv(obj); };
	this.req.send(null);
}

function AjaxFetch(urlstr, funcname)
{
	this.req = XHR(); // OK
	this.req.open('GET', urlstr, true);
	var obj = this;
	eval('var func = '+funcname+';');
	this.req.onreadystatechange = function() { func(obj); };
	this.req.send(null);
}

function AjaxPost(urlstr, params, div)
{
	this.div = document.getElementById(div);
	this.req = XHR(); // OK
	this.req.open('POST', urlstr, true);
	var obj = this;
	this.div.innerHTML = ' ';
	this.req.onreadystatechange = function() { SetDiv(obj); };
	this.req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	this.req.setRequestHeader("Content-length", params.length);
	this.req.setRequestHeader("Connection", "close");
	this.req.send(params);
}

function AjaxPostParams(theForm)
{
	var params = '';
	for (var x = 0; x < theForm.elements.length; x++)
	{
		if (theForm.elements[x].type == 'radio' || theForm.elements[x].type == 'checkbox') {
			if (theForm.elements[x].checked) {
				params += theForm.elements[x].name+'='+encodeURIComponent(theForm.elements[x].value)+'&';
			}
		}
		else {
			params += theForm.elements[x].name+'='+encodeURIComponent(theForm.elements[x].value)+'&';
		}
	}
	params += 'ajax=1';
	return params;
}