// image swapping function
function swap_image(img_object, img_src) {
	var target_object = img_object;
	target_object.src = img_src;
}

function prevent_select() {
  document.onselectstart = function() {return false;} // ie
  document.onmousedown = function() {return false;} // mozilla
}

function popup_page(uri, w, h) {
	var uri_param_start = uri.search(/=/);
	uri_param_start++;
	var window_name = uri.slice(uri_param_start);
	var params = 'height='+h+',width='+w+',resizable=false,scrollbars=false,toolbar=false,menubar=false,location=false,status=false,directories=false,fullscreen=false,dependent=true';
	window.open(uri, window_name, params);
}