function getXhr(){
var xhr = null; 
if(window.XMLHttpRequest) 
xhr = new XMLHttpRequest(); 
else if(window.ActiveXObject){ 
try {
xhr = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
xhr = new ActiveXObject("Microsoft.XMLHTTP");
}
}
else { 
alert("Votre navigateur ne supporte pas le javascripts"); 
xhr = false; 
} 
return xhr
}

function charge_mod(mod,id,par1){
var xhr = getXhr()
xhr.onreadystatechange = function(){
if(xhr.readyState == 4 && xhr.status == 200){
leselect = xhr.responseText;
document.getElementById('content').innerHTML = leselect;
}
}
var mod;
var id;
var par1;
xhr.open("POST", mod+".php",true);
xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
	
xhr.send("id="+id);				
}