function createRequestObject() {
    var ro;
    var browser = navigator.appName;
    if(browser == "Microsoft Internet Explorer"){
        ro = new ActiveXObject("Microsoft.XMLHTTP");
    }else{
        ro = new XMLHttpRequest();
    }
    return ro;
}
var global_lock = false;
var http3 = createRequestObject();

function addToCompare(site_url,p_id,img_link,title,sess,hier_id) {

if ( !global_lock )
{
    http3.open('get', site_url + '/modules/Products/script/comparephp/compare.php?p_id='+p_id+'&img_link=' 
	+ img_link + '&title=' + title+'&session='+sess+'&hier_id='+hier_id);
    http3.onreadystatechange = handleResponse;
    http3.send(null);
	global_lock = true;

}
}

function handleResponse() {
    if(http3.readyState == 4){
        var response = http3.responseText;
		if ( response != 'FULL' )
		{
		document.getElementById("compare_b").style.display = "block";
			document.getElementById('compare_line').innerHTML = response;
			scroll(0,250);
			//alert(response);
		}
		global_lock=false;
    }

}