var state = 'none';

function showhide(layer_ref,curimg)
{
	var oImg1 = eval("document.getElementById('"+curimg+"')");
	if (state == 'block') {
				state = 'none';
				var minus = "crossbtn.png";
	}
	else {
		state = 'block';
		var minus = "minus.jpg";
	}
	if (document.all) { //IS IE 4 or 5 (or 6 beta)
		eval( "document.all." + layer_ref + ".style.display = state");	
	}
	if (document.layers) { //IS NETSCAPE 4 or below
		document.layers[layer_ref].display = state;
		//oImg1.src = "/images/"+minus; 
		//document.frm_img.imgsrc.value=minus
	}
	if (document.getElementById &&!document.all) {
		hza = document.getElementById(layer_ref);
		hza.style.display = state;
	}
	oImg1.src = "/images/"+minus; 
	document.frm_img.imgsrc.value=minus	
}