function RandomPic()
{
	var random_number = Math.floor(Math.random() * 100);
	var num_images = 6;
	var execute_string = "";
	
	random_number %= num_images;
	random_number++;
	
	random_number = "0" + random_number;

	if(document.layers)
	{
		execute_string = "window.document.head_pic" + random_number + ".style.visibility = 'visible'";
		eval(execute_string);
	} // end if(document.layers)
	else if(window.document.all)
	{
		execute_string = "window.document.all.head_pic" + random_number + ".style.visibility = 'visible'"
		eval(execute_string);
	} // end else if(window.document.all)
	else if(!document.all && document.getElementById)
	{
		execute_string = "document.getElementById('head_pic" + random_number + "').style.visibility='visible'"
		eval(execute_string);
	} // end else if(!document.all && document.getElementById)
}