function showHideInfo(elementID, trigger) {
    var trig = document.getElementById(trigger); //.innerHTML;
	var elm = document.getElementById(elementID);
	
	if (elm != null) 
	{
	    if(elm.style.display == "none") {
	        elm.style.display = "block";
	        trig.src = "http://www.pryor.com/site/images/zoom-minus.gif";
	    } else {
	        elm.style.display= "none";
	        trig.src = "http://www.pryor.com/site/images/zoom-plus.gif";
	    }
	}
}