function load_block(div,block,id,caption)    
{
	
	//alert("first step");
    var xhr;
	var send;
    if (window.XMLHttpRequest) {xhr = new XMLHttpRequest(); send = new XMLHttpRequest();}
    else if (window.ActiveXObject) {xhr = new ActiveXObject('Microsoft.XMLHTTP'); send = new ActiveXObject('Microsoft.XMLHTTP');}
    else
        {
        alert('JavaScript : votre navigateur ne supporte pas les objets XMLHttpRequest...');
        return;
        }
	
	send.open('POST','blockdep.php',true);
	
	    send.onreadystatechange = function() //check changement état
        {
        if (send.readyState == 4)// Page prete a etre affiché
            var fooo = send.responseText;
        }
		
	send.setRequestHeader('Content-type','application/x-www-form-urlencoded');
    data = 'js=yes&id='+escape(id)+'&block='+escape(caption);
    send.send(data);
	// alert("end");
	if ( document.getElementById(""+div+"").innerHTML == '') {
		// alert("inner vide");
		
    new Ajax.Request('/blocks/'+escape(block)+'_block.php', {method: 'post', parameters: 'js=yes', onSuccess:function (t) { document.getElementById(''+div+'').innerHTML = t.responseText; }});
	
    /* xhr.open('POST','/blocks/'+escape(block)+'_block.php',true);
	// alert("Ouverture done");

    xhr.onreadystatechange = function() //check changement état
        {
        if (xhr.readyState == 4)// Page prete a etre affiché
            {
            if (document.getElementById) document.getElementById(""+div+"").innerHTML = xhr.responseText;
			// Some Code HERE
            }
        }
    //xhr.setRequestHeader('Content-type','application/x-www-form-urlencoded');
    var data = 'js=yes';
    xhr.send(data); */
	// alert("end inner vide");
	}else{
		if (document.getElementById(''+div+'').style.display=="none")			
			document.getElementById(''+div+'').style.display="block";
		else
			document.getElementById(''+div+'').style.display="none";
	}
}