// JavaScript Document
function validate_contact_form(form)
{
	var return_value = false;
	if(form.name.value == "")
	{
		alert("Please enter your name");
		form.name.focus();
	}
	else if(form.email.value == "")
	{
		alert("Please enter your email address");
		form.email.focus();
	}
	else
	{
		return_value = true;
	}
	return return_value;
}

function validate_post(form)
{
	var return_value = false;
	if(form.tId.value == 0 && form.txtSubject.value == "")
	{
		alert("Please enter a subject");
		form.txtSubject.focus();
	}
	else if(form.txtContent.value == "")
	{
		alert("Please enter some content");
		form.txtContent.focus();
	}
	else
	{
		return_value = true;
	}
	return return_value;
}

// Global variable to store image details
var newImage = document.createElement("img");
function swapImage(filename)
{
	clearImage();
	newImage = document.createElement("img");
	var img_path = filename;
	newImage.setAttribute("src", img_path);
	newImage.setAttribute("onLoad", setTimeout("insertImage()",0));
}

function clearImage()
{
	newImage = document.createElement("img");
	var holderDiv = document.getElementById('mainImageHolder');
	var oldImage = document.getElementById('mainImage');
	var removed = holderDiv.removeChild(oldImage);
}

function insertImage()
{
	var holderDiv = document.getElementById('mainImageHolder');
	var oldImage = document.getElementById('loadingImage');
	newImage.setAttribute("id", "mainImage");
	holderDiv.appendChild(newImage,oldImage);
}

function urldecode( str ) {
    // http://kevin.vanzonneveld.net
    // +   original by: Philip Peterson
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +      input by: AJ
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // %          note: info on what encoding functions to use from: http://xkr.us/articles/javascript/encode-compare/
    // *     example 1: urldecode('Kevin+van+Zonneveld%21');
    // *     returns 1: 'Kevin van Zonneveld!'
    // *     example 2: urldecode('http%3A%2F%2Fkevin.vanzonneveld.net%2F');
    // *     returns 2: 'http://kevin.vanzonneveld.net/'
    // *     example 3: urldecode('http%3A%2F%2Fwww.google.nl%2Fsearch%3Fq%3Dphp.js%26ie%3Dutf-8%26oe%3Dutf-8%26aq%3Dt%26rls%3Dcom.ubuntu%3Aen-US%3Aunofficial%26client%3Dfirefox-a');
    // *     returns 3: 'http://www.google.nl/search?q=php.js&ie=utf-8&oe=utf-8&aq=t&rls=com.ubuntu:en-US:unofficial&client=firefox-a'
    
    var histogram = {}, histogram_r = {}, code = 0, str_tmp = [];
    var ret = str.toString();
    
    var replacer = function(search, replace, str) {
        var tmp_arr = [];
        tmp_arr = str.split(search);
        return tmp_arr.join(replace);
    };
    
    // The histogram is identical to the one in urlencode.
    histogram['!']   = '%21';
    histogram['%20'] = '+';
    
    for (replace in histogram) {
        search = histogram[replace]; // Switch order when decoding
        ret = replacer(search, replace, ret) // Custom replace. No regexing   
    }
    
    // End with decodeURIComponent, which most resembles PHP's encoding functions
    ret = decodeURIComponent(ret);
 
    return ret;
}

function open_window(url)
{
	var features = "menubar=no,location=no,resizable=no,scrollbars=yes,status=no,toolbar=no";
	
	var new_win = window.open(url,"popup",features);
}