function getAjaxObj()
{
	var xmlHttp = null;
	try
	{
		//Firefox, Opera 8+, Safari
		xmlHttp=new XMLHttpRequest();
	}
	catch(e)
	{
		try 
		{
			xmlHttp=new ActiveXObject("Msxml12.XMLHTTP");
		}
		catch(e)
		{
			xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	return xmlHttp;
}