function getContentFromServer(url, ID) {
	    ID2Change = ID;
	    http_request = false;
	
		if (window.XMLHttpRequest) { // Mozilla, Safari,...
	        http_request = new XMLHttpRequest();
	        if (http_request.overrideMimeType) {
	            http_request.overrideMimeType('text/xml');
	        }
	    } else if (window.ActiveXObject) { // IE
	        try {
	            http_request = new ActiveXObject("MSXML2.XMLHTTP.3.0");
	        } catch (e) {
	            try {
	                http_request = new ActiveXObject("Microsoft.XMLHTTP");
	            } catch (e) {}
	        }
	    }
	
	    if (!http_request) {
	        return false;
	    }
	    
		if(arguments.length==3){
			http_request.onreadystatechange = arguments[2];
		}else{
			http_request.onreadystatechange = getContents4Page;
		}
	
	    http_request.open('POST', url, true);
	    http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	    var postText = 'ID2change=' + ID2Change + '&';
		var PostForm=document.forms["mainform"];
	    for (var i = 0; i < PostForm.elements.length; ++i) {
	        if (PostForm.elements[i].type == "checkbox" || PostForm.elements[i].type == 'radio' ) {
	            if (PostForm.elements[i].checked) {
	                postText = postText + '&' + PostForm.elements[i].name +'='+PostForm.elements[i].value;
	            }
	        } else {
	            postText = postText + '&'  + PostForm.elements[i].name +'='+PostForm.elements[i].value;
	        }
	    }
	    http_request.send(postText);
	}