window.onload = function(){
}
function changepic(img_id,img_src) {
	var elem = getElem(thelayer);
	elem.src=img_src;
}
function showid(id) {
	var elem = getElem(id);
	elem.style.display='block';
}
function hideid(id) {
	var elem = getElem(id);
	elem.style.display='none';
}
function toggleLayer(thelayer){
	var elem = getElem(thelayer);
	vis = elem.style;
	if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined){
		vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
	}
	vis.display = (vis.display==''||vis.display=='block')?'none':'block';
}
function getElem(id){
	var elem;
	if( document.getElementById ){
		elem = document.getElementById(id);
	}else if( document.all ){
		elem = document.all[id];
	}else if( document.layers ){
		elem = document.layers[id];
	}
	return elem
}
function ajax(page,passvar,div,str_return,jsondecode) {
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null) {
		alert ("Browser does not support HTTP Request")
		return
	}
	var url=page+".php"
	url=url+"?sid="+Math.random()
	url=url+"&"+passvar
	if (str_return != ""){
		xmlHttp.open("GET",url,false)
		xmlHttp.onreadystatechange=function(){stateChanged(div)}		
	} else {
		xmlHttp.open("GET",url,true)
		xmlHttp.onreadystatechange=function(){stateChanged(div)}
	}
	xmlHttp.send(null)
	if (str_return != ''){
		if (div != ''){ betterInnerHtml(div, xmlHttp.responseText) }
		if (jsondecode != ''){ return parseJSON(xmlHttp.responseText) }
		else { return xmlHttp.responseText }
	}
}
function stateChanged(div) {
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") {
		if (div != ''){
			betterInnerHtml(div, xmlHttp.responseText)
		}
	}
}
function GetXmlHttpObject() {
	var xmlHttp=null;
	try {  xmlHttp=new XMLHttpRequest(); }
	catch (e) {
		try { xmlHttp=new ActiveXObject("Msxml2.XMLHTTP"); }
		catch (e) { xmlHttp=new ActiveXObject("Microsoft.XMLHTTP"); }
	}
	return xmlHttp;
}
function betterInnerHtml(id, content){
	var randomstring = randomstr(5);
	var newdiv = document.createElement(randomstring);
	var ctrl;
	ctrl = getElem(id);
	removeChildNodes(ctrl);
	newdiv.innerHTML = content;
 	var container = document.getElementById(id);
	container.appendChild(newdiv);
}
function removeChildNodes(ctrl) {
	while (ctrl.childNodes[0]) {
		ctrl.removeChild(ctrl.childNodes[0]);
	}
}
function randomstr(howlong) {
	var text = "";
	var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
	for( var i=0; i <= howlong; i++ ) text += possible.charAt(Math.floor(Math.random() * possible.length));
	return text;
}
function parseJSON(json){
        if(/^("(\\.|[^"\\\n\r])*?"|[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t])+?$/.test(json)){
            var j = eval('(' + json + ')');
            return j;
	}
}