// rollover for all Learning Resources Sections

var timeout_LearningId;
var timeout_LearningInternalId;


function preload_learningInternal() {
if(document.images) {
  var ImgArray = new Array();
  for (var i = 0; i < 6; i++) {
    ImgArray[i] = new Image();
  }    
	ImgArray[0].src = "images/learning_intrnl_guides.gif";
	ImgArray[1].src = "images/learning_intrnl_bookclub.gif";
	ImgArray[2].src = "images/learning_intrnl_timelines.gif";
	ImgArray[3].src = "images/learning_intrnl_links.gif";
	ImgArray[4].src = "images/learning_intrnl_schedule.gif";
	ImgArray[5].src = "images/learning_intrnl_library.gif";
  }
}

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

  var ImgArray = new Array();
  for (var i = 0; i < 8; i++) {
    ImgArray[i] = new Image();
  }    
	ImgArray[0].src = "homeimages/menu_guides_over.gif";
	ImgArray[1].src = "homeimages/menu_guides_text.gif";
	ImgArray[2].src = "homeimages/menu_bookclub_over.gif";
	ImgArray[3].src = "homeimages/menu_bookclub_text.gif";
	ImgArray[4].src = "homeimages/menu_timelines_over.gif";
	ImgArray[5].src = "homeimages/menu_timelines_text.gif";
	ImgArray[6].src = "homeimages/menu_links_over.gif";
	ImgArray[7].src = "homeimages/menu_links_text.gif";
	
  }
}



function reset_Menu() {
	var imgTurl, imgTimeurl;
	if(document.images) {
  		imgTurl = 'homeimages/rollover_default.gif'; 
   		document.rollover_text.src=imgTurl;	
	}
}


function reset_InternalMenu(imgRurl) {
	if(document.images) {
   		document.learning_nav.src=imgRurl;
	}
}

function off_nav(thisNav, imgName) {
	var objStr,obj, imgRurl, imgTurl;
	if(document.images) {
		if (thisNav == 'm') {  
	  		objStr = 'document.' + imgName;
      		obj = eval(objStr);    
      		imgRurl = 'homeimages/' + imgName + '.gif';
      		obj.src = imgRurl;      
      		timeout_LearningId = setTimeout("reset_Menu()",10); 		
      		}
      	else if (thisNav == 'nm') {  
	  		objStr = 'document.' + imgName;
      		obj = eval(objStr);    
      		imgRurl = 'homeimages/' + imgName + '.gif';
      		obj.src = imgRurl;      	
      		}	
      	else if (thisNav == 'nm_jpeg') {  
	  		objStr = 'document.' + imgName;
      		obj = eval(objStr);    
      		imgRurl = 'homeimages/' + imgName + '.jpg';
      		obj.src = imgRurl;      	
      		}		 
      	else if (thisNav == 'i') { 
      		imgRurl = 'images/learning_intrnl_' + imgName + '.gif';
      		timeout_LearningInternalId = setTimeout("reset_InternalMenu(\"" + imgRurl + "\")",10);
      		}   		     
	}
}

function on_nav(thisNav, imgName) {
	var objStr,obj, imgRurl, imgTurl;
	if(document.images) {
		if (thisNav == 'm') {
			clearTimeout(timeout_LearningId);
	  		objStr = 'document.' + imgName;
			obj = eval(objStr);
      		imgTurl = 'homeimages/' + imgName + '_text.gif'; 
      		imgRurl = 'homeimages/' + imgName + '_over.gif'; 
      		document.rollover_text.src = imgTurl;	
      		obj.src = imgRurl;
      		}
      	else if (thisNav == 'nm') {
	  		objStr = 'document.' + imgName;
      		obj = eval(objStr);    
      		imgRurl = 'homeimages/' + imgName + '_over.gif';
      		obj.src = imgRurl;      		
      		}
      	else if (thisNav == 'nm_jpeg') {
	  		objStr = 'document.' + imgName;
      		obj = eval(objStr);    
      		imgRurl = 'homeimages/' + imgName + '_over.jpg';
      		obj.src = imgRurl;      		
      		}		
      	else if (thisNav == 'i') {
      		clearTimeout(timeout_LearningInternalId); 
      		imgRurl = 'images/learning_intrnl_' + imgName + '.gif';
      		document.learning_nav.src=imgRurl;
      		}		       		
	}
}