// declare new variables for each new div that you add, and link to the div by ID
// var region_div = document.getElementById("region_div");
var doc = null;

function ajax() {
	// Make a new XMLHttp object
	if (typeof window.ActiveXObject != 'undefined' ) doc = new ActiveXObject("Microsoft.XMLHTTP");
	else doc = new XMLHttpRequest();
}

function SelectForm(id_form, destination){

    if (id_form != '') {
		ajax();
		// Load the result from the response page
		// ** As far a I know firefox will only load a document on the SAME domain!!	
	    if (doc){
	       destination.innerHTML = "Loading data...";
	       doc.open("GET", "form.php?id=" + id_form, false);
	       doc.send(null);
	    	// Write the response to the div	    	
	       destination.innerHTML = doc.responseText;
	    }
	    else{
	      
	       destination.innerHTML = 'Browser unable to create XMLHttp Object';
	    }        
    }
    else {
    	destination.innerHTML = "Form is not selected";
    }
}