// $Id: scripts.js,v 1.7 2007/03/27 22:14:30 csands Exp csands $
// Global JavaScripts

// rollover scripts

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;
}

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_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_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

// 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=400');
}

// printer-friendly version popup

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

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;
	}
}

function image_popup(file,width,height)
{
	var newHeight = Number(Number(height) + 20);
	var newWidth = Number(Number(width) + 20);
	imgWin = window.open('/common/imagepopup.php?img='+file+'&w='+width+'&h='+height, 'Image', 'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,width='+newWidth+',height='+newHeight);
	imgWin.moveTo(30,30);
	imgWin.focus();
}


function studies_setup()
{
	document.write('<script type="text/javascript" language="JavaScript" src="/cms/studies/user/functions.js"></script>');
}

////////////////////////////////////////////////////////////////////////////////////
// Homepage Functions //////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////

function initTab(id) { callAjax('/pubtab.php', 'key='+id, 'tabcontent'); }

function switchTab(id)
{
	for (var p = 0; p < pubsarr.length; p++) {
		var istate = pubsarr[p] == id ? 'on' : 'off';
		document.images[pubsarr[p]+'Tab'].src = '/images/tmpl/pubs_'+pubsarr[p]+'_'+istate+'.gif';
	}
	callAjax('/pubtab.php', 'key='+id, 'tabcontent');
}

////////////////////////////////////////////////////////////////////////////////////
// AJAX Functions //////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////

function callAjax(url, params, pageElement, formAction, callMessage, errorMessage) {
	var method = formAction ? formAction : 'GET';
	if (callMessage)
		document.getElementById(pageElement).innerHTML = callMessage;
	try {
		req = new XMLHttpRequest(); /* e.g. Firefox */
	} catch(e) {
		try {
			req = new ActiveXObject("Msxml2.XMLHTTP");  /* some versions IE */
		} catch (e) {
			try {
				req = new ActiveXObject("Microsoft.XMLHTTP");  /* some versions IE */
			} catch (E) {
				req = false;
			} 
		} 
	}
	req.onreadystatechange = function() {responseAjax(pageElement, errorMessage);};
	url = method == 'GET' ? url+'?'+params : url;
	req.open(method,url,true);
	if (method == 'POST') {
		req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		req.setRequestHeader("Content-length", params.length);
		req.setRequestHeader("Connection", "close");
		req.send(params);
	} else {
		req.send(null);
	}
}

function responseAjax(pageElement, errorMessage) {
	var output = '';
	if(req.readyState == 4) {
		if(req.status == 200) {
			output = req.responseText;
			document.getElementById(pageElement).innerHTML = output;
		} else {
			if (errorMessage)
				document.getElementById(pageElement).innerHTML = errorMessage+"\n"+output;
		}
	}
}