function jah(url,target) {
    // native XMLHttpRequest object
	document.getElementById(target).style.display = 'block';
	document.getElementById(target).style.visibility = 'visible';
    document.getElementById(target).innerHTML = '<h3>retrieving content ...</h3>';
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
        req.onreadystatechange = function() {jahDone(target);};
        req.open("GET", url, true);
        req.send(null);
    // IE/Windows ActiveX version
    } else if (window.ActiveXObject) {
        req = new ActiveXObject("Microsoft.XMLHTTP");
        if (req) {
            req.onreadystatechange = function() {jahDone(target);};
            req.open("GET", url, true);
            req.send();
        }
    }
}    

function jahDone(target) {
    // only if req is "loaded"
    if (req.readyState == 4) {
        // only if "OK"
        if (req.status == 200) {
            results = req.responseText;
            document.getElementById(target).innerHTML = results;
        } else {
            document.getElementById(target).innerHTML="error:\n" +
                req.statusText;
        }
    }
}

function pausecomp(millis)
{
date = new Date();
var curDate = null;

do { var curDate = new Date(); }
while(curDate-date < millis);
}


function emptyfield(text1) {
  if (text1.value.length==0) return true;
  for (var i=0; i<text1.value.length; ++i) {
       var ch=text1.value.charAt(i);
       if (ch !=' ' && ch !='\t') return false;
  }
  return true;
}
function checkform(obj) {
	var error = "";
	if (emptyfield(obj.name)) {
		error += "- enter Name\n";
	}
	if (emptyfield(obj.email)) {
		error += "- enter Email\n";
	}
	if (emptyfield(obj.main)) {
		error += "- enter Comment\n";
	}
	if (error) {
		alert ("The following error(s) occurred:\n\n" +error);
		return false;
	} else {
		return true;
	}
}




var nW,nH,oH,oW;
function zoomToggle(iWideSmall,iHighSmall,iWideLarge,iHighLarge,whichImage){
	oW=whichImage.style.width;oH=whichImage.style.height;
	if((oW==iWideLarge)||(oH==iHighLarge)){
	nW=iWideSmall;nH=iHighSmall;}else{
	nW=iWideLarge;nH=iHighLarge;}
	whichImage.style.width=nW;whichImage.style.height=nH;
}