function showDefaultBanner(news_id)
{
   var str;
   var xmlHttp = null; 	
	    if (typeof window.ActiveXObject != 'undefined' ) 
	    { 
		    xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); 
	    } 
	    else 
	    { 
		    xmlHttp = new XMLHttpRequest(); 
	    }
	    
	    var url="/news/ajaxcall/defaultbanner.asp?news_id="+ news_id +"&sid="+Math.random()
    	    	
	    xmlHttp.open("POST", url, false);
        xmlHttp.send(null);
	    
	    if (xmlHttp.readyState == 4 || xmlHttp.readyState=="complete") 
	    {	
		    document.getElementById("defaultbannerDiv").innerHTML=xmlHttp.responseText
	    }
}