var xmlhttp;
try {
	//If the javascript version is greater than 5.
	xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
	//If not, then use the older active x object.
	try {
		//If we are using IE.
		xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
	} catch (E) {
		//Else we must be using a non-IE browser.
		xmlhttp = false;
	}
}  
//If we are using a non-IE browser, create a JavaScript instance of the object.
if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
	xmlhttp = new XMLHttpRequest();
}

function makerequest(serverPage, objID) {
	//alert (serverPage);
	var obj = document.getElementById(objID);
	xmlhttp.open("GET", serverPage);
	xmlhttp.onreadystatechange = function() {
		if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
			obj.innerHTML = xmlhttp.responseText;
		}
	}
	xmlhttp.send(null);
}
var antid=-1;
var actid=-1;
function pst(idpst){
	var dpst=document.getElementById('pst'+idpst);
	var pst_ax=document.getElementById('pst_ax');
	dpst.className='psth';
	actid=idpst;
	if(actid!=antid){
		if (antid>0){
			var dpst2=document.getElementById('pst'+antid);
			dpst2.className='psth2';
		} 
		antid=actid;
	}
	pst_ax.innerHTML='<div class="div_load"></div>';
	makerequest ('pst'+idpst+'.php','pst_ax');
}