// JavaScript Document


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;
}

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];}
}

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];}
}

// http://www.javascriptkit.com/javatutors/loadjavascriptcss.shtml
function loadjscssfile(filename, filetype){
 if (filetype=="js"){ //if filename is a external JavaScript file
  var fileref=document.createElement('script')
  fileref.setAttribute("type","text/javascript")
  fileref.setAttribute("src", filename)
 }
 else if (filetype=="css"){ //if filename is an external CSS file
  var fileref=document.createElement("link")
  fileref.setAttribute("rel", "stylesheet")
  fileref.setAttribute("type", "text/css")
  fileref.setAttribute("href", filename)
 }
 if (typeof fileref!="undefined")
  document.getElementsByTagName("head")[0].appendChild(fileref)
}

function removejscssfile(filename, filetype){
 var targetelement=(filetype=="js")? "script" : (filetype=="css")? "link" : "none" //determine element type to create nodelist from
 var targetattr=(filetype=="js")? "src" : (filetype=="css")? "href" : "none" //determine corresponding attribute to test for
 var allsuspects=document.getElementsByTagName(targetelement)
 for (var i=allsuspects.length; i>=0; i--){ //search backwards within nodelist for matching elements to remove
  if (allsuspects[i] && allsuspects[i].getAttribute(targetattr)!=null && allsuspects[i].getAttribute(targetattr).indexOf(filename)!=-1)
   allsuspects[i].parentNode.removeChild(allsuspects[i]) //remove element by calling parentNode.removeChild()
 }
}

var filesadded="" //list of files already added

function checkloadjscssfile(filename, filetype){
 if (filesadded.indexOf("["+filename+"]")==-1){
  loadjscssfile(filename, filetype)
  filesadded+="["+filename+"]" //List of files added in the form "[filename1],[filename2],etc"
 }
 else
  alert("file already added!")
}

function initStuff() { 
	MM_preloadImages('/images/header-home.jpg');
}


function checkEmail(add){
var ok
var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
if (filter.test(add)) { ok=true }
else{ ok=false }
return (ok)
}

function checkIt(frm) {
	var retstate = 'true';
	if (frm.name.value == "") { alert('Please indicate a contact person'); frm.name.focus(); retstate = 'false'; return false; }
	if (checkEmail(frm.email.value)== false) { alert('Please enter a valid email address'); frm.email.focus(); retstate = 'false'; return false; }
	if (frm.comment.value == "") { alert('Please enter your message'); frm.comment.focus(); retstate = 'false'; return false; }
	if (retstate=='true') { return true; }
}


function MM_goToURL() { //v3.0
  var i, args=MM_goToURL.arguments; document.MM_returnValue = false;
  for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");
}

function init() { 
	document.getElementById("stationselect").selectedIndex = 0;
}


// SNOW PAGES

var selected = "2-month";
	
	function initlinks(){
		var p = document.getElementById("plot4");
		var p_children = p.childNodes;
		p.style.backgroundColor='#D8DFF0';
	} 
	
	function switchPlot(link,pic) {
		goto = "graphs/snow_depth_" + pic + ".png";
		document.myplot.src = goto;
		
		document.getElementById("plot1").style.backgroundColor='white';
		document.getElementById("plot2").style.backgroundColor='white';
		document.getElementById("plot3").style.backgroundColor='white';
		document.getElementById("plot4").style.backgroundColor='white';
		document.getElementById("plot5").style.backgroundColor='white';
		document.getElementById("plot6").style.backgroundColor='white';
		
		link.style.backgroundColor='#D8DFF0';
		selected = link.firstChild.nodeValue;
	}
	
	function css(link,mode) {
	
		
		if(mode=='a') { link.style.backgroundColor='#D8DFF0';	}
		if(mode=='b') { 
			if(link.firstChild.nodeValue!=selected) { link.style.backgroundColor='white'; }	
		}		
	}
	
	
// --------------- Menu jumpstart for IE --------------------------------

/*sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);*/