subject_id = '';
	function handleHttpResponse() {
		if (http.readyState == 4) {
			if (subject_id != '') {
				document.getElementById(subject_id).innerHTML = http.responseText;
			}
		}
	}
	function getHTTPObject() {
		var xmlhttp;
		/*@cc_on
		@if (@_jscript_version >= 5)
			try {
				xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
			} catch (e) {
				try {
					xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
				} catch (E) {
					xmlhttp = false;
				}
			}
		@else
		xmlhttp = false;
		@end @*/
		if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
			try {
				xmlhttp = new XMLHttpRequest();
			} catch (e) {
				xmlhttp = false;
			}
		}
		return xmlhttp;
	}
	var http = getHTTPObject(); // We create the HTTP Object

	function cerca(div_id,pagina)
	{
		
		subject_id = div_id;
		
		http.open("GET", pagina);
		
		
		
		http.onreadystatechange = handleHttpResponse;
		http.send(null);
		if(pagina.length>0){
			box('1');
		}else{
			box('0');
		}
	}	



	function box(act)	{
	  if(act=='0')	  {
		document.getElementById('box').style.display = 'none';

	  }	  else{
		  document.getElementById('box').style.display = 'block';
	}
	}