// rollover for all level1 gNav

var timeout_gId;

function preload_gNav() {
if(document.images) {

  var ImgArray = new Array();
  for (var i = 0; i < 8; i++) {
    ImgArray[i] = new Image();
  }    
//	ImgArray[0].src = "../images/global_about_roll.gif";
//	ImgArray[1].src = "../images/global_schedule_roll.gif";
//	ImgArray[2].src = "../images/global_history_roll.gif";
//	ImgArray[3].src = "../images/global_detectives_roll.gif";
//	ImgArray[4].src = "../images/global_american_roll.gif";
	ImgArray[0].src = "../images/global_nav_about_over.gif";
	ImgArray[1].src = "../images/global_nav_schedule_over.gif";
	ImgArray[2].src = "../images/global_nav_history_over.gif";
	ImgArray[3].src = "../images/global_nav_detectives_over.gif";
	ImgArray[4].src = "../images/global_nav_american_over.gif";
	ImgArray[5].src = "../images/global_nav_home_over.gif";
	ImgArray[6].src = "../images/global_nav_search_over.gif";
	ImgArray[7].src = "../images/global_nav_shop_over.gif";
//	preloadFlag_gNav = true;	
  }
}


function reset_Descrip() {
	var imgTurl
	if(document.images) {
		imgTurl = '../images/global_head_' + this_head + '.gif';
   		document.top_text.src=imgTurl;	
	}
}


function off_gnav(thisNav, imgName) {
	var objStr,obj, imgRurl, imgTurl;
	if(document.images) {
		if (thisNav == 'g') {
	 		objStr = 'document.g_' + imgName;
      		obj = eval(objStr);
      		
      		imgRurl = '../images/global_nav_' + imgName + '.gif';
      		obj.src = imgRurl;
//      		timeout_gId = setTimeout("reset_Descrip()",10); 
      		}
      	else if (thisNav == 'g_o') {
	  		objStr = 'document.g_' + imgName;
      		obj = eval(objStr);    
      		imgRurl = '../images/global_nav_' + imgName + '.gif';
      		obj.src = imgRurl;    		
      		}	     
	}
}

function on_gnav(thisNav, imgName) {
	var objStr,obj, imgRurl, imgTurl;
	if(document.images) {
		if (thisNav == 'g') {
			clearTimeout(timeout_gId);
	  		objStr = 'document.g_' + imgName;
      		obj = eval(objStr);
//     		imgTurl = '../images/global_' + imgName + '_roll.gif';      
      		imgRurl = '../images/global_nav_' + imgName + '_over.gif';
//     		document.top_text.src=imgTurl;
      		obj.src = imgRurl;
      		}
      	else if (thisNav == 'g_o') {
	  		objStr = 'document.g_' + imgName;
      		obj = eval(objStr);     		    
      		imgRurl = '../images/global_nav_' + imgName + '_over.gif';
      		obj.src = imgRurl;    		
      		}	       		
	}
}


function ratings_pop(){
//      alert("popping:" + charname + ";" + type);
var ratings = "/wgbh/masterpiece/schedule/ratings.html";
var ratings_win = window.open(ratings,'ratings_win','toolbar=0,location=0,status=0,menubar=0,scrollbars=1,resizable=1,width=450,height=435');
ratings_win.focus();
}