function post(url,tab_param)
{
	return;
	var xhr_object = null;
	var data=null;
	if(window.XMLHttpRequest) // Firefox
		xhr_object = new XMLHttpRequest();
	else if(window.ActiveXObject) // Internet Explorer
		xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
	else // XMLHttpRequest non supporté par le navigateur
	{
		alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest...");
		return;
	}
	xhr_object.open("POST", url, true);
	xhr_object.onreadystatechange = function() 
									{
										if(xhr_object.readyState == 4)
										{
											//document.write(xhr_object.responseText);
										
											if(xhr_object.getResponseHeader("Content-Type")=="text/javascript")				
												return eval(xhr_object.responseText);
											else
												return  document.write(xhr_object.responseText);
										}
									}
	xhr_object.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	if(arguments.length>1)
	{
		data="";
		try{
		for(i=0;i<tab_param.length;i++)
		{
			if(i>0) data += "&";
			if(!isArray(tab_param[i]))
					tab_param[i]=tab_param[i].split("=");
			else if(tab_param[i].length==1)
					tab_param[i]=tab_param[i][0].split("=");
					
			try{data += escape(tab_param[i][0])}catch(e){}
			try{data += "="+escape(tab_param[i][1])}catch(e){}

			
		}}catch(e){}
   }
  
    xhr_object.send(data);
}
function isArray(a) {

	return isObject(a) && a.constructor == Array;
   
}
function isObject(a) {
    return (a && typeof a == 'object') || isFunction(a);
}
function isFunction(a) {
    return typeof a == 'function';
}
function get_obj(id)
{
	return document.getElementById(id);
}