var xmlhttp;

function GetXmlHttpObject() {
	if (window.XMLHttpRequest) {
  		// code for IE7+, Firefox, Chrome, Opera, Safari
  		return new XMLHttpRequest();
		alert ("In 77!");
  	}
	if (window.ActiveXObject) {
  		// code for IE6, IE5
  		return new ActiveXObject("Microsoft.XMLHTTP");
  	}
	return null;
}

function showMessage(value, query, idEdit) {
	if (value.length==0) {
		document.getElementById(idEdit).innerHTML="";
		return;
	}
	xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null) {
		alert ("Your browser does not support XMLHTTP!");
		return;
	}
	var url="messagedisplay.php";
	url=url+"?q="+query;
	url=url+"&v="+value;
	url=url+"&sid="+Math.random();
	xmlhttp.onreadystatechange=stateChanged;
	xmlhttp.open("GET",url,true);
	xmlhttp.send(null);

	function stateChanged() {
		if (xmlhttp.readyState==4)
		{
			document.getElementById(idEdit).innerHTML=xmlhttp.responseText;
		}
	}
}

function preload() {
    var args = preload.arguments;
    document.imageArray = new Array(args.length);
    for(var i=0; i<args.length; i++) {
            document.imageArray[i] = new Image;
            document.imageArray[i].src = args[i];
    }
}

function hide(id) {
    document.getElementById(id).style.display="none";
}

function show(id) {
    document.getElementById(id).style.display="block";
}

function resetTextField(id) {
    document.getElementById(id).value = "";
}

function swapImage(n,src) {
    if (document.images) {
            document[n].src = src;
    }
}

function updateContent(id,content){
    document.getElementById(id).innerHTML=content;
}

function is_blank(s) {
    for(var i = 0; i < s.length; i++) {
        var c = s.charAt(i);
        if ((c != ' ') && (c != '\n') && (c != '\t')) return false;
    }
    return true;
}

function valid_email(e) {
    var validChars = "1234567890qwertyuiop[]asdfghjklzxcvbnm.@-_QWERTYUIOPASDFGHJKLZXCVBNM";

    for(i=0; i < e.length ;i++){
        if(validChars.indexOf(e.charAt(i))<0){
            return false;
        }
    }


    re = /(@.*@)|(\.\.)|(^\.)|(^@)|(@$)|(\.$)|(@\.)/;
    re_two = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
    if (!e.match(re) && e.match(re_two)) {
        return (-1);
    }
}

function checkContactForm(form) {
    if(!valid_email(form.email.value)){
        alert("Invalid email address.");
        return false;
    }

    if(form.subject.value == "" || is_blank(form.subject.value)){
        alert("Please enter email's subject.");
        return false;
    }

    if(form.message.value == "" || is_blank(form.message.value)){
        alert("Please enter your message.");
        return false;
    }

    return true;
}

function checkPropertyForm(form) {
    if(form.propertytitle.value == "" || is_blank(form.propertytitle.value)){
        alert("Please fill in new listing's Title");
        return false;
    }

    return true;
}

function checkProfileForm(form) {
    if(form.name.value == "" || is_blank(form.name.value)){
        alert("Please fill in your display name");
        return false;
    }

    if(form.email.value == "" || is_blank(form.email.value)){
        alert("Please fill in your email");
        return false;
    }

    if(!valid_email(form.email.value)){
        alert("Invalid Email.");
        return false;
    }

    return true;
}

function checkRegistrationForm(form) {
    if(form.username.value == "" || is_blank(form.username.value) || (!validHexNumSimple(form.username.value))){
        alert("Invalid username.");
        return false;
    }

    if(form.name.value == "" || is_blank(form.name.value)){
        alert("Please fill in display name.");
        return false;
    }

    if(form.password.value == "" || is_blank(form.password.value)){
        alert("Please fill in password.");
        return false;
    }

    if(form.password.value != form.password2.value){
        alert("Please re-type the same password.");
        return false;
    }

    if(form.email.value == "" || is_blank(form.email.value)){
        alert("Please fill in your email.");
        return false;
    }

    if(!valid_email(form.email.value)){
        alert("Invalid email.");
        return false;
    }

    return true;
}

function validHexNumSimple(n) {

    var validChars = "1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
    for(i=0; i < n.length ;i++){
        if(validChars.indexOf(n.charAt(i))<0){
            return false;
        }
    }

    return true;
}

function validHexNum(n, numdigit) {
    if((numdigit > 0) && (n.length != numdigit)) {
        return false;
    }

    var validChars = "1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
    for(i=0; i < n.length ;i++){
        if(validChars.indexOf(n.charAt(i))<0){
            return false;
        }
    }

    return true;
}

function checkHexValue(element) {
    if(!is_blank(element.value)){
        if(!validHexNum(element.value, 6)){
            alert("HEX Value has to be 6 characters and each character has to be either 0-9, a-z or A-Z.");
            return false;
        }
    }

    return true;
}

function checkEmail(element) {
    if(!is_blank(element.value)){
        if(!valid_email(element.value)){
            alert("Invalid Email.");
            return false;
        }
    }

    return true;
}

function checkFirstRegisterForm(form) {
    if(form.username == "" || is_blank(form.username.value)){
        alert("Please fill in your username");
        return false;
    }

    return true;
}

function insertColor(element, color, id) {
    element.value = color;
    document.getElementById(id).style.display="none";
}

var tabdropdown={
	disappeardelay: 200, //set delay in miliseconds before menu disappears onmouseout
	disablemenuclick: false, //when user clicks on a menu item with a drop down menu, disable menu item's link?
	enableiframeshim: 1, //1 or 0, for true or false

	//No need to edit beyond here////////////////////////
	dropmenuobj: null, ie: document.all, firefox: document.getElementById&&!document.all, previousmenuitem:null,
	currentpageurl: window.location.href.replace("http://"+window.location.hostname, "").replace(/^\//, ""), //get current page url (minus hostname, ie: http://www.dynamicdrive.com/)

	getposOffset:function(what, offsettype){
		var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
		var parentEl=what.offsetParent;
			while (parentEl!=null){
				totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
				parentEl=parentEl.offsetParent;
			}
		return totaloffset;
	},

	showhide:function(obj, e, obj2){ //obj refers to drop down menu, obj2 refers to tab menu item mouse is currently over
		if (this.ie || this.firefox)
			this.dropmenuobj.style.left=this.dropmenuobj.style.top="-500px"
		if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover"){
			if (obj2.parentNode.className.indexOf("default")==-1) //if tab isn't a default selected one
				obj2.parentNode.className="selected"
			obj.visibility="visible"
			}
		else if (e.type=="click")
			obj.visibility="hidden"
	},

	iecompattest:function(){
		return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
	},

	clearbrowseredge:function(obj, whichedge){
		var edgeoffset=0
		if (whichedge=="rightedge"){
			var windowedge=this.ie && !window.opera? this.standardbody.scrollLeft+this.standardbody.clientWidth-15 : window.pageXOffset+window.innerWidth-15
			this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetWidth
		if (windowedge-this.dropmenuobj.x < this.dropmenuobj.contentmeasure)  //move menu to the left?
			edgeoffset=this.dropmenuobj.contentmeasure-obj.offsetWidth
		}
		else{
			var topedge=this.ie && !window.opera? this.standardbody.scrollTop : window.pageYOffset
			var windowedge=this.ie && !window.opera? this.standardbody.scrollTop+this.standardbody.clientHeight-15 : window.pageYOffset+window.innerHeight-18
			this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetHeight
			if (windowedge-this.dropmenuobj.y < this.dropmenuobj.contentmeasure){ //move up?
				edgeoffset=this.dropmenuobj.contentmeasure+obj.offsetHeight
				if ((this.dropmenuobj.y-topedge)<this.dropmenuobj.contentmeasure) //up no good either?
					edgeoffset=this.dropmenuobj.y+obj.offsetHeight-topedge
			}
			this.dropmenuobj.firstlink.style.borderTopWidth=(edgeoffset==0)? 0 : "1px" //Add 1px top border to menu if dropping up
		}
		return edgeoffset
	},

	dropit:function(obj, e, dropmenuID){
		if (this.dropmenuobj!=null){ //hide previous menu
			this.dropmenuobj.style.visibility="hidden" //hide menu
			if (this.previousmenuitem!=null && this.previousmenuitem!=obj){
				if (this.previousmenuitem.parentNode.className.indexOf("default")==-1) //If the tab isn't a default selected one
					this.previousmenuitem.parentNode.className=""
			}
		}
		this.clearhidemenu()
		if (this.ie||this.firefox){
			obj.onmouseout=function(){tabdropdown.delayhidemenu(obj)}
			obj.onclick=function(){return !tabdropdown.disablemenuclick} //disable main menu item link onclick?
			this.dropmenuobj=document.getElementById(dropmenuID)
			this.dropmenuobj.onmouseover=function(){tabdropdown.clearhidemenu()}
			this.dropmenuobj.onmouseout=function(e){tabdropdown.dynamichide(e, obj)}
			this.dropmenuobj.onclick=function(){tabdropdown.delayhidemenu(obj)}
			this.showhide(this.dropmenuobj.style, e, obj)
			this.dropmenuobj.x=this.getposOffset(obj, "left")
			this.dropmenuobj.y=this.getposOffset(obj, "top")
			this.dropmenuobj.style.left=this.dropmenuobj.x-this.clearbrowseredge(obj, "rightedge")+"px"
			this.dropmenuobj.style.top=this.dropmenuobj.y-this.clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+0+"px"
			this.previousmenuitem=obj //remember main menu item mouse moved out from (and into current menu item)
			this.positionshim() //call iframe shim function
		}
	},

	contains_firefox:function(a, b) {
		while (b.parentNode)
		if ((b = b.parentNode) == a)
			return true;
		return false;
	},

	dynamichide:function(e, obj2){ //obj2 refers to tab menu item mouse is currently over
		var evtobj=window.event? window.event : e
		if (this.ie&&!this.dropmenuobj.contains(evtobj.toElement))
			this.delayhidemenu(obj2)
		else if (this.firefox&&e.currentTarget!= evtobj.relatedTarget&& !this.contains_firefox(evtobj.currentTarget, evtobj.relatedTarget))
			this.delayhidemenu(obj2)
	},

	delayhidemenu:function(obj2){
		this.delayhide=setTimeout(function(){tabdropdown.dropmenuobj.style.visibility='hidden'; if (obj2.parentNode.className.indexOf('default')==-1) obj2.parentNode.className=''},this.disappeardelay) //hide menu
	},

	clearhidemenu:function(){
		if (this.delayhide!="undefined")
			clearTimeout(this.delayhide)
	},

	positionshim:function(){ //display iframe shim function
		if (this.enableiframeshim && typeof this.shimobject!="undefined"){
			if (this.dropmenuobj.style.visibility=="visible"){
				this.shimobject.style.width=this.dropmenuobj.offsetWidth+"px"
				this.shimobject.style.height=this.dropmenuobj.offsetHeight+"px"
				this.shimobject.style.left=this.dropmenuobj.style.left
				this.shimobject.style.top=this.dropmenuobj.style.top
			}
		this.shimobject.style.display=(this.dropmenuobj.style.visibility=="visible")? "block" : "none"
		}
	},

	hideshim:function(){
		if (this.enableiframeshim && typeof this.shimobject!="undefined")
			this.shimobject.style.display='none'
	},

        isSelected:function(menuurl){
                var menuurl=menuurl.replace("http://"+menuurl.hostname, "").replace(/^\//, "")
                return (tabdropdown.currentpageurl==menuurl)
        },

	init:function(menuid, dselected){
		this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body //create reference to common "body" across doctypes
		var menuitems=document.getElementById(menuid).getElementsByTagName("a")
		for (var i=0; i<menuitems.length; i++){
			if (menuitems[i].getAttribute("rel")){
				var relvalue=menuitems[i].getAttribute("rel")
				document.getElementById(relvalue).firstlink=document.getElementById(relvalue).getElementsByTagName("a")[0]
				menuitems[i].onmouseover=function(e){
					var event=typeof e!="undefined"? e : window.event
					tabdropdown.dropit(this, event, this.getAttribute("rel"))
				}
			}
			if (dselected=="auto" && typeof setalready=="undefined" && this.isSelected(menuitems[i].href)){
				menuitems[i].parentNode.className+=" selected default"
				var setalready=true
			}
			else if (parseInt(dselected)==i)
				menuitems[i].parentNode.className+=" selected default"
		}
	}

}