function loadXmlHttp(url,id) 
	{
	var f = this;
	f.xmlHttp = null;
	if (window.XMLHttpRequest&&!f.ie||/^http/.test(window.location.href))
	f.xmlHttp = new XMLHttpRequest();
	else if (/(object)|(function)/.test(typeof createRequest))
	f.xmlHttp = createRequest();
	else 
		{
		f.xmlHttp = null;
		}
	if(f.xmlHttp != null)
		{
		f.el = document.getElementById(id);
		f.xmlHttp.open("GET",url,true);
		f.xmlHttp.onreadystatechange = function(){f.stateChanged();};
		f.xmlHttp.send(null);
		}
	}
loadXmlHttp.prototype.stateChanged=function() 
	{
	if(this.xmlHttp.readyState == 4 && (this.xmlHttp.status == 200 || !/^http/.test(window.location.href)))
	this.el.innerHTML = this.xmlHttp.responseText;
	}
var requestText=function()
	{
	new loadXmlHttp('getpic.php?id=1','picDiv');
	setInterval(function(){new loadXmlHttp('getpic.php?id=1', 'picDiv');}, 30000);
	}
if(window.addEventListener) 
	window.addEventListener('load',requestText,false);
else if(window.attachEvent) 
	window.attachEvent('onload',requestText);