/* indentify the browser */
DOM = (document.getElementById) ? 1 : 0;
NS4 = (document.layers) ? 1 : 0;
IE4 = (document.all) ? 1 : 0;
OPERA = (navigator.userAgent.indexOf("Opera 5") > -1 || navigator.userAgent.indexOf("Opera/5") > -1 || navigator.userAgent.indexOf("Opera 6") > -1 || navigator.userAgent.indexOf("Opera/6") > -1) ? 1 : 0;
/* edit box stuff */
function insertTag(obj, stag, etag)
{
	if ( navigator.userAgent.indexOf("MSIE") > -1 && !OPERA ) {
		insertTagIE(obj, stag, etag);
	}
	else {
		insertTagNS(obj, stag, etag);	
	}
}

function insertTagNS(obj, stag, etag)
{
	obj.value = obj.value+stag+etag;	
}

function insertTagIE(obj, stag, etag)
{
	r=document.selection.createRange();
	if( document.selection.type == 'Text' && (obj.value.indexOf(r.text) != -1) ) {
		a = r.text;
		r.text = stag+r.text+etag;
		if ( obj.value.indexOf(document.selection.createRange().text) == -1 ) {
			document.selection.createRange().text = a;
		}
	}
	else insertAtCaret(obj, stag+etag);	
}

function dialogTag(obj, qst, def, stag, etag)
{
var q;
	q = prompt(qst, def);
	if ( !q ) return;
	stag = stag.replace(/%s/i, q);
	insertTag(obj, stag, etag);
}

function url_insert()
{
	if ( check_selection() )
		dialogTag(document.post_form.post, 'Location:', 'http://', '[url=%s]', '[/url]');
	else
		dialogTag(document.post_form.post, 'Location:', 'http://', '[url]%s[/url]', '');
}

function check_selection()
{
var rn;
var sel;

	if ( document.layers ) return 0;
	if ( navigator.userAgent.indexOf("MSIE") < 0 ) return 0;

	r = document.selection.createRange();

	if ( r.text.length && (document.post_form.msg_body.value.indexOf(r.text) != -1) ) {
		a = document.selection.createRange().text;
		rn = Math.random();
		r.text = r.text + ' ' + rn;
		
		if ( document.post_form.msg_body.value.indexOf(rn) != -1 ) {
			sel = 1;
		} else {
			sel = 0;
		}
		
		document.selection.createRange().text = a;
	}
	
	return sel;
}

function storeCaret(textEl)
{
	 if (textEl.createTextRange) textEl.caretPos = document.selection.createRange().duplicate();
}

function insertAtCaret(textEl, text)
{
	if (textEl.createTextRange && textEl.caretPos)
	{
		var caretPos = textEl.caretPos;
		caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? text + ' ' : text;
	}
	else 
		textEl.value  =  textEl.value + text;
}

function email_insert()
{
	if ( check_selection() ) {
		dialogTag(document.post_form.post, 'Email:', '', '[url=mailto:%s]', '[/url]');
	}	
	else
		dialogTag(document.post_form.post, 'Email:', '', '[email]%s[/email]', '');
}

function image_insert()
{
	dialogTag(document.post_form.msg_body, 'Image URL:', 'http://', '[img]%s[/img]', '');
}

function insertParentTagIE(stag, etag)
{
	r=window.opener.document.selection.createRange();
	obj = window.opener.document.post_form.msg_body;
	
	if( window.opener.document.selection.type == 'Text' && (obj.value.indexOf(r.text) != -1) ) {
		a = r.text;
		r.text = stag+r.text+etag;
		if ( obj.value.indexOf(window.opener.document.selection.createRange().text) == -1 ) {
			window.opener.document.selection.createRange().text = a;
		}
	}
	else insertAtCaret(obj, stag+etag);
}

function insertParentTagNS(stag, etag)
{
	window.opener.document.post_form.msg_body.value = window.opener.document.post_form.msg_body.value + stag + etag;
}

function insertParentTag(stag, etag)
{
	if ( document.all ) 
		insertParentTagIE(stag, etag);
	else
		insertParentTagNS(stag, etag);
	
}

function window_open(url,winName,width,height)
{
	xpos = (screen.width-width)/2;
	ypos = (screen.height-height)/2;
	options = "scrollbars=1,width="+width+",height="+height+",left="+xpos+",top="+ypos+"position:absolute";
	window.open(url,winName,options);
}

function layerVis(layer,on)
{
        if (on) {
		if (DOM)
			document.getElementById(layer).style.visibility = "visible";
		else if (NS4)
			document.layers[layer].visibility = "show";
		else if (IE4)
			document.all[layer].style.visibility = "visible";
	} else {
		if (DOM)
			document.getElementById(layer).style.visibility = "hidden";
		else if (NS4)
			document.layers[layer].visibility = "hide";
		else if (IE4)
			document.all[layer].style.visibility = "hidden";
	}
}

function textCounter(theField, charsLeft, maxChars) {
	if (theField.value.length > maxChars) {
		theField.value = theField.value.substring(0, maxChars);
	} else {
		charsLeft.value = maxChars - theField.value.length;
	}
}

function ismaxlength(obj){
var mlength=obj.getAttribute? parseInt(obj.getAttribute("maxlength")) : ""
if (obj.getAttribute && obj.value.length>mlength)
obj.value=obj.value.substring(0,mlength)
}

var http = createRequestObject();
var displayRating = '';
var currentId = '';

function createRequestObject() {
    var ro;
    var browser = navigator.appName;
    
    if(browser == "Microsoft Internet Explorer"){
        ro = new ActiveXObject("Microsoft.XMLHTTP");
    }
    else{
        ro = new XMLHttpRequest();
    }
    return ro;    
}



function updateRating(postid, session, vote) {
    http.open('get', 'vote.php?postid='+postid+'&session='+session+'&vote='+vote);
    http.onreadystatechange = handleResponse;
    http.send(null);
}

function checkUsername() {
	var username = document.ca.username.value;
	if ((!username) || (!alphanumeric(username)) || (username.length < 4) || (username.length > 16) ) {
	document.getElementById('responseText').innerHTML = '<br/><span class="smalltext"><strong>Please enter a valid username using only letters and numbers, at least 4-digits length</strong></span>';	
	}
	else  {
			
    http.open('get', 'check_username.php?username='+username);
    http.onreadystatechange = handleUsernameResponse;
    http.send(null);
	}
}

function handleUsernameResponse() {
	if(http.readyState == 4){
        results = http.responseText.split(",");
		if (results[1] == 'TRUE'){
			document.getElementById('responseText').innerHTML = '<br/><span class="smalltext">Sorry, <strong>'+results[0]+'</strong> is not available</span>';
		}
		else {
		
		document.getElementById('responseText').innerHTML = '<br/><span class="smalltext"><strong>'+results[0]+'</strong> is available!</span>';
		
		}
       
    }
}


function handleResponse() {
	if(http.readyState == 4){
        var response = http.responseText;
	
		if (response == 'ERROR'){
			alert("Sorry... Failed to update database.");
		}
		else {
		

		}
       
    }
}




function switchClass(thediv, votes, type) {

var div1 = document.getElementById(thediv+"u");
var div2 = document.getElementById(thediv+"d");

	if (div1.className) {
		if  (div1.className == "voteUp") {
		div1.setAttribute("className", "voteUpDisab");
		div2.setAttribute("className", "voteDownDisab");
		vPlus = votes + 1;
		z = vPlus +1;
		vPlus = parseInt(vPlus, z);
		
			if (type == 1) {
			div1.innerHTML = vPlus;
			}
			else {
			div2.innerHTML = vPlus;
			}
			
		}
	}
	else {
		div1.setAttribute("class", "voteUpDisab");
		div2.setAttribute("class", "voteDownDisab");
		window.alert("not ie");
		
	}

}


function alphanumeric(alphane)
{
	var numaric = alphane;
	for(var j=0; j<numaric.length; j++)
		{
		  var alphaa = numaric.charAt(j);
		  var hh = alphaa.charCodeAt(0);
		  if((hh > 47 && hh<59) || (hh > 64 && hh<91) || (hh > 96 && hh<123))
		  {
		  }
		else	{
			 return false;
		  }
		}
 return true;
}