function img_clk(){
	{ 
    var ajaxRequest;
	try
		{
		// Opera 8.0+, Firefox, Safari
		ajaxRequest = new XMLHttpRequest();
		} 
	catch (e)
		{
		// Internet Explorer Browsers
		try
			{
				ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
			} 
		catch (e) 
			{
			try
				{
				ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
				} 
			catch (e)
				{
				alert("Your browser broke!");
				return false;
				}
			}
		}
	var url="img_clk.php";
    ajaxRequest.open("GET",url,true);
    ajaxRequest.send(null);
	}
}