//
// put all custom javascript functions and global definitions here
//

function el(id)
{
	return document.getElementById(id);
}

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

// ------------------------------------------------------------------------------------ //


function domoreless()
{
	var link =el("moreless_link");
	var theel = el("moreless_text")
	//1--TOGGLE
	var linkname = link.innerHTML;
	if (linkname == "More...")
	{
		 js_showhide(theel,1);
		 linkname = "Less...";
	}
	else
	{
		 js_showhide(theel,0);
		 linkname = "More...";
	}
	link.innerHTML = linkname;

	return void(0);
}

function js_showhide(el,show)
{
	if (!el) return;
	if (show)
	{
		el.style.display = 'block';
	}
	else
	{
		el.style.display = 'none';
	}
}

// --------------------------------------------------------------------------------------- //

function add_to_menu(selectname,thetext,thevalue,select)
{
	var elOptNew = document.createElement('option');
	elOptNew.text = thetext;
	elOptNew.value = thevalue;
	if (select)
	{
		elOptNew.selected = true;
	}
	
	var elSel = document.getElementById(selectname);
	
	if (elSel.options[0])
	if (elSel.options[0].value == 0)
	{
		elSel.options[0].selected = false; //unselect the NONE option 
	}
	
	try 
	{
		elSel.add(elOptNew, null); // standards compliant; doesn't work in IE
	}
	catch(ex) 
	{
		elSel.add(elOptNew); // IE only
	}

}

function add_to_menu_and_select(selectname,thetext,thevalue)
{
	var selectname_in = selectname;
	var filter = window["filter_" + selectname_in];  // see filterlist.js -- global defined?
	if (filter) 
	{
		// get all the menu options back in the list before we do the add_to_menu
		filter.set(' '); // trick to show all! 
		el("regexp_"+selectname_in).value='';
	}
	
	var multiname = "multi_" + selectname_in;
	if (el("id_" + selectname_in))
	{
		selectname = "id_" + selectname_in; //if we have a id of id_primary_investigator use that instead of primary_investigator
	}
	
	add_to_menu(selectname,thetext,thevalue,1);
	
	var multi = el(multiname);
	if (multi)
	{
		add_to_menu(multiname,thetext,thevalue,1);
	}
	
	if (filter) 
	{
		//step 1--make sure we add the new value into the filter's copy, then init the list just as when we first arrive at the page
		filter.init();
		//step 2--now filter for that name you just added!
		filter.set(thetext); 
		el("regexp_"+selectname_in).value=thetext;
	}	
}

function add_to_menus(selectnames,thetext,thevalue)
{
	//loop -- are there cases where we need to add to multiple lists?  not yet
	//add_to_menu_and_select(selectname,thetext,thevalue)
}

function showhideit(showid,show)
{
	var showspan = document.getElementById(showid);	
	if (show)
	{
		showspan.style.display = 'block';
	}
	else
	{
		showspan.style.display = 'none';
	}		
}

function toggleit(that,section_num)
{
	var show;
	if (that.innerHTML == "(Skip This Section)") 
	{
		that.innerHTML = "(Show This Section)";
		show = 0;
	}
	else
	{
		that.innerHTML = "(Skip This Section)";
		show = 1;
	}
	showhideit("section_"+section_num,show);
	return false;
}

function fnAdd(name,menu)
{
	var selected = menu.options[menu.selectedIndex].text;
	var selected_value = menu.options[menu.selectedIndex].value;
	//alert(menu.id);
	
	///if (usesingle[menu.id])
	///{
	///	selecteda = selected.split(divider[menu.id]);
	///	selected = selecteda[1]; //the second value (e.g. country in "continent - country")
	///}
	
	if (!selected) return;
	var three = document.getElementById(name);	
	var len = three.options.length;
	
	//make sure not already in list!
	for(var i in three.options)
	{
		var val = three.options[i];
		if (val && (selected_value == val.value))
		{
			alert(selected +" already in list");
			return;
		}
	}
	
	//do it!
	//alert(len+selected);
	var opt = new Option();
	opt.text = selected;
	opt.value = selected_value;
	three.options[len] = opt;

	//three.selectedIndex = len; // select the final one?
	fnClear(name);

}

function fnClear(name)
{
	var three = document.getElementById(name);
	if (!three) three = document.getElementById("id_"+name);
	three.selectedIndex = -1;
}

function fnDelete(name)
{
	var three = document.getElementById(name);
	var selectedi = three.selectedIndex;
	if (selectedi < 0) return;
	var selected = three.options[selectedi].text;
	if (!selected) return;
	//alert("deleting #"+selectedi +" "+selected);
	
	//removed!
	three.options[selectedi] = null;
}

function fnSelectAll(names)
{
	names = names.split(",");
	for(var n in names)
	{
		name = names[n];
		var three = document.getElementById(name);
//		alert(name);
		three.multiple = true;
		for(var i in three.options)
		{
			if (!three.options[i]) continue;
			if (three.options[i] == null) continue;
			if (!three.options[i].text) continue;
			three.options[i].selected = true;
			//alert(three.options[i].text);
		}
	}
	return true;
}

//
// from header.html
//

function newwindow(reference){ //opens reference in new window without tool bar, but with scroll
	newwind=window.open(reference,'refwin','width=300,height=400,scrollbar=yes');
	newwind.focus();
}
function showDate() {  // Display current date in date field
	var currDate = new Date()
	var currDay = currDate.getDate();
	var currMonth = currDate.getMonth()+1;
	var currYear = currDate.getYear();
	if (currYear < 2000) currYear += 1900;  //fixes for netscape normalizing to 1900
	var currDateStr = currMonth + "/" + currDay + "/" + currYear;
	document.visitorForm.today.value=currDateStr;
}
function validEmail(emailinfo) {  //From JavaScript for the World Wide Web 3rd Edition
	var emailadd=emailinfo.value;
	invalidChars = " /:,;";
	if (emailadd.length == 0) {						// cannot be empty
		return false;
		}
	for (i=0; i<invalidChars.length; i++) {	// does it contain any invalid characters?
		badChar = invalidChars.charAt(i);
		if (emailadd.indexOf(badChar,0) > -1) {
			return false;
		}
	}
	atPos = emailadd.indexOf("@",1);			// there must be one "@" symbol
	if (atPos == -1) {
		return false;
	}
	if (emailadd.indexOf("@",atPos+1) != -1) {	// and only one "@" symbol
		return false;
	}
	periodPos = emailadd.indexOf(".",atPos);
	if (periodPos == -1) {					// and at least one "." after the "@"
		return false;
	}
	if (periodPos+3 > emailadd.length)	{		// must be at least 2 characters after the "."
		return false;
	}
	return true
}

function isBlank(testStr){ // check for blank line or all spaces
	if (testStr.length == 0){                // Blank line with nothing entered?
		return true;
	}
	for (var i = 0; i <= testStr.length-1; i++){  // all spaces?
		if (testStr.charAt(i) != " "){
			return false;
		}
	}
	return true;
}
function validateEmail(email){ //validate e-mail address
	if (!validEmail(email)){
		alert('You must enter a valid e-mail address!');
//		document.visitorForm.email.focus()
		return false;
	}
	return true;
}
function validateTextBox(str,fieldName){  //validate the field is neither empty nor all spaces
	if (isBlank(str.value)){ //If the field is blank select it again so user can fill in field
		alert('You must enter information into the ' + fieldName + ' field!');
		return false;
	}
	return true;
}
function validateForm(thisForm)  // validate Survey data
  {
  //Add person's fullname to the subject heading on form - reset to just visitor
  // research form so if the person goes back for a second look it doesn't add there
  // name multiple times to the subject heading
  document.visitorForm.subject.value="Visitor Research Form";
  document.visitorForm.subject.value=document.visitorForm.subject.value + ": " + document.visitorForm.fullname.value;
  if (!validateTextBox(thisForm.fullname,"Full Name")){  // full name valid?
    document.visitorForm.fullname.focus();
    return false;
    }
  if (!validateTextBox(thisForm.address,'Address')){  // Address entered?
	document.visitorForm.address.focus();    
	return false;
    }
  if (!validateEmail(thisForm.email)){  // email valid?
    	document.visitorForm.email.focus();
	return false;
    }
  if (!validateTextBox(thisForm.phone,'Telephone')){  // Telephone number entered?
	document.visitorForm.phone.focus();
    return false;
    }
  if (!validateTextBox(thisForm.restitle,'Research Title')){  // Research title entered?
	document.visitorForm.restitle.focus();
    return false;
    }
  return true;

  }