var timeout_siteInternalId;


function preload() {
if(document.images) {
  var ImgArray = new Array();
  for (var i = 0; i < 37; i++) {
    ImgArray[i] = new Image();
  }
	ImgArray[0].src = "/wgbh/amex/presidents/images/sb_go_over.gif";
	ImgArray[1].src = "/wgbh/amex/presidents/images/sb_nav_biographies_over.gif";
	ImgArray[2].src = "/wgbh/amex/presidents/images/sb_nav_domestic_over.gif";
	ImgArray[3].src = "/wgbh/amex/presidents/images/sb_nav_early_over.gif";
	ImgArray[4].src = "/wgbh/amex/presidents/images/sb_nav_filmmore_over.gif";
	ImgArray[5].src = "/wgbh/amex/presidents/images/sb_nav_foreign_over.gif";
	ImgArray[6].src = "/wgbh/amex/presidents/images/sb_nav_index_over.gif";
	ImgArray[7].src = "/wgbh/amex/presidents/images/sb_nav_legacy_over.gif";
	ImgArray[8].src = "/wgbh/amex/presidents/images/sb_nav_politics_over.gif";
	ImgArray[9].src = "/wgbh/amex/presidents/images/sb_nav_psources_over.gif";
	ImgArray[10].src = "/wgbh/amex/presidents/images/sb_nav_purchase_over.gif";
	ImgArray[11].src = "/wgbh/amex/presidents/images/sb_nav_tguide_over.gif";
	ImgArray[12].src = "/wgbh/amex/presidents/images/sb_nav_vote_over.gif";
	ImgArray[13].src = "/wgbh/amex/presidents/images/printable_over.gif";
	ImgArray[14].src = "/wgbh/amex/presidents/images/hr_ddot_footer_over.gif";
	ImgArray[15].src = "/wgbh/amex/presidents/images/nav_archives.gif";
	ImgArray[16].src = "/wgbh/amex/presidents/images/nav_contact.gif";
	ImgArray[17].src = "/wgbh/amex/presidents/images/nav_kids.gif";
	ImgArray[18].src = "/wgbh/amex/presidents/images/nav_schedule.gif";
	ImgArray[19].src = "/wgbh/amex/presidents/images/nav_shop.gif";
	ImgArray[20].src = "/wgbh/amex/presidents/images/nav_teachers.gif";
	ImgArray[21].src = "/wgbh/amex/presidents/images/nav_whoweare.gif";
	ImgArray[22].src = "/wgbh/amex/presidents/images/sb_nav_domestic.gif";
	ImgArray[23].src = "/wgbh/amex/presidents/images/sb_nav_early.gif";
	ImgArray[24].src = "/wgbh/amex/presidents/images/sb_nav_filmmore.gif";
	ImgArray[25].src = "/wgbh/amex/presidents/images/sb_nav_foreign.gif";
	ImgArray[26].src = "/wgbh/amex/presidents/images/sb_nav_index.gif";
	ImgArray[27].src = "/wgbh/amex/presidents/images/sb_nav_legacy.gif";
	ImgArray[28].src = "/wgbh/amex/presidents/images/sb_nav_politics.gif";
	ImgArray[29].src = "/wgbh/amex/presidents/images/sb_nav_psources.gif";
	ImgArray[30].src = "/wgbh/amex/presidents/images/sb_nav_purchase.gif";
	ImgArray[31].src = "/wgbh/amex/presidents/images/sb_nav_tguide.gif";
	ImgArray[32].src = "/wgbh/amex/presidents/images/sb_nav_vote.gif";
	ImgArray[34].src = "/wgbh/amex/presidents/images/site_link_over.gif";
	ImgArray[35].src = "/wgbh/amex/presidents/images/sb_nav_purchase_over.gif";
	ImgArray[36].src = "/wgbh/amex/presidents/images/videos_top_over.gif";
  }
}

function nav_handler(){
  var URL = document.sb_select_nav.site.options[document.sb_select_nav.site.selectedIndex].value;
  window.location.href = URL;
}


function subnav_on(srcName, thisSection) {
	var objStr, obj, sec_objStr, sec_obj, imgRurl, sec_imgRurl;
	if(document.images) {

//			clearTimeout(timeout_siteInternalId);

	  		objStr = 'document.' + thisSection;
	  		obj = eval(objStr);

      		sec_objStr = 'document.' + srcName;
      		sec_obj = eval(sec_objStr);

      		imgRurl = '/wgbh/amex/presidents/images/' + thisSection + '.gif';
      		obj.src=imgRurl;

      		sec_imgRurl = '/wgbh/amex/presidents/images/' + srcName + '_over.gif';
      		sec_obj.src = sec_imgRurl;
/*
alert(imgRurl);
alert(sec_imgRurl);
*/
	}
}

function subnav_off(thisSection, srcName) {
	var objStr, obj, sec_objStr, sec_obj, imgRurl, sec_imgRurl;
	if(document.images) {

	  		objStr = 'document.' + thisSection;
	  		obj = eval(objStr);

      		sec_objStr = 'document.' + srcName;
      		sec_obj = eval(sec_objStr);

      		imgRurl = '/wgbh/amex/presidents/images/' + thisSection + '.gif';
      		obj.src=imgRurl;

      		sec_imgRurl = '/wgbh/amex/presidents/images/' + srcName + '_over.gif';
      		sec_obj.src = sec_imgRurl;

/*
alert(imgRurl);
alert(sec_imgRurl);
*/

//      	timeout_siteInternalId = setTimeout("reset_NavandRollText(\"" + thissection + "\")",10);  		
	}
}


function swap_generic(srcName, imgName) {
	var objStr,obj, imgRurl, imgTurl;
	if(document.images) {
	  		objStr = 'document.' + srcName;
      		obj = eval(objStr);
      		imgTurl = '/wgbh/amex/presidents/' + imgName;
      		obj.src=imgTurl;
	}
}


function makeit (num,exception) {
	var browser = navigator.appName;
	var version = parseInt(navigator.appVersion);
	var width;
	if (browser == "Netscape" && version >= '4') {
	width = window.innerWidth;
	if (num == 'total') {
		//make sure path to spacer.gif is correct
		space = "<img src=\"/wgbh/amex/presidents/images/spacer.gif\" width=\"" + width +"\" height=\"1\" border=\"0\" alt=\" \"/>";
		return space;
	} else if (width <= num) {  
		space = '&nbsp;';
	} else {
		
		width = width - num; 
		//make sure path to spacer.gif is correct
		space = "<img src=\"/wgbh/amex/presidents/images/spacer.gif\" width=\"" + width +"\" height=\"1\" border=\"0\" alt=\" \"/>"; 
	}
	} else if (browser != "Netscape" && num == 'total') {
	space = '';
	} else if (browser !="Netscape" && exception == "IE") {
	space = '';		 	
	} else {
	space = '&nbsp;';
	}
	return space;
}


function popThrough(popThrough){
	if (!window.opener){
		self.open(popThrough)
	}
	else if (window.opener.closed){
		window.open(popThrough);
		window.close();
	}
	else {
		window.opener.location.href = popThrough; 
		window.close();
	}
}


//Force Tables in  Netscape to go all the way to the right margin
//Pass 'IE' as the second argument to the function if you want to make
//sure IE doesn't put anything in(especially  &nbsp; where a table cell
//is supposed to be only 1px high

function makeIt (num,exception) {
 	 		var browser = navigator.appName;
	 var version = parseInt(navigator.appVersion);
	 var width;
	 if (browser == "Netscape" && version >= '4') {
	 	width = window.innerWidth;
	 	if (num == 'total') {
	 		//make sure path to spacer.gif is correct
 			space = "<img src='/wgbh/amex/presidents/images/spacer.gif' width='" + width +"' height='1'  border='0'  alt='  ' />"; 
 			return space;
 		} else if (width <= num) {  
 			space = '&nbsp;';
 		} else {
 			
 			width = width - num; 
 			//make sure path to spacer.gif is correct
 			space = "<img src='/wgbh/amex/presidents/images/spacer.gif' width='" + width +"' height='1'  border='0'  alt='  ' />"; 
 		}
	 } else if (browser != "Netscape" && num == 'total') {
 		space = '';
	 } else if (browser !="Netscape" && exception == "IE") {
		space = '';		 	
	 } else {
	 	space = '&nbsp;';
	 }
	 return space;
}


//Force NN to reload on re-size
 		function fixNN () {
 			var ua = navigator.appName;
	var uanum = parseFloat(navigator.appVersion);
	if (ua == "Netscape" && uanum >= '4.08') {
		location.reload();
	} else {
		return;
	}
}

function arc_swap(srcName, type, over) {
	var objStr, obj, imgTurl, txtStr, txt, txtTurl;
	if(document.images) {
	  		objStr = 'document.' + srcName + '_' + type;
      		obj = eval(objStr);
      		imgTurl = '/wgbh/amex/presidents/images/icon_' + type + '_' + over + '.gif';

	  		txtStr = 'document.' + srcName;
      		txt = eval(txtStr);
      		txtTurl = '/wgbh/amex/presidents/images/icon_text_' + over + '.gif';

      		txt.src=txtTurl;
      		obj.src=imgTurl;
	}
}


function swap2(imgName) {
	var objStr,obj, imgRurl;
	if(document.images) {
	  objStr = 'document.' + imgName;
      obj = eval(objStr);
      imgRurl = '/wgbh/amex/presidents/images/' + imgName + '_2.gif';
      obj.src = imgRurl;
	}
}

function swap1(imgName) {
	var objStr,obj, imgRurl;
	if(document.images) {
	  objStr = 'document.' + imgName;
      obj = eval(objStr);
      imgRurl = '/wgbh/amex/presidents/images/' + imgName + '_1.gif';
      obj.src = imgRurl;
	}
}

function off(imgName) {
	var objStr,obj, imgRurl;
	if(document.images) {
	  objStr = 'document.' + imgName;
      obj = eval(objStr);
      imgRurl = '/wgbh/amex/presidents/images/' + imgName + '.gif';
      obj.src = imgRurl;
	}
}

function on(imgName) {
	var objStr,obj, imgRurl;
	if(document.images) {
	  objStr = 'document.' + imgName;
      obj = eval(objStr);
      imgRurl = '/wgbh/amex/presidents/images/' + imgName + '_over.gif';
      obj.src = imgRurl;
	}
}

function off2(imgName) {
	var objStr,obj, imgRurl;
	if(document.images) {
	  objStr = 'document.' + imgName;
      obj = eval(objStr);
      imgRurl = '/wgbh/amex/presidents/homeimages/' + imgName + '.gif';
      obj.src = imgRurl;
	}
}

function on2(imgName) {
	var objStr,obj, imgRurl;
	if(document.images) {
	  objStr = 'document.' + imgName;
      obj = eval(objStr);
      imgRurl = '/wgbh/amex/presidents/homeimages/' + imgName + '_over.gif';
      obj.src = imgRurl;
	}
}

function swap(srcName, imgName) {
	var objStr,obj, imgRurl, imgTurl;
	if(document.images) {
	  		objStr = 'document.' + srcName;
      		obj = eval(objStr);
      		imgTurl = '/wgbh/amex/presidents/images/' + imgName;
      		obj.src=imgTurl;
	}
}

function swap_int(srcName, imgName) {
	var objStr,obj, imgRurl, imgTurl;
	if(document.images) {
	  		objStr = 'document.' + srcName;
      		obj = eval(objStr);
      		imgTurl = '/wgbh/amex/presidents/images/' + imgName;
      		obj.src=imgTurl;
	}
}

function int_nav_off(imgName) {
	var objStr,obj, imgRurl, imgTurl;
	if(document.images) {
		if(imgName){
	  		objStr = 'document.m_' + imgName;
      		obj = eval(objStr);
      		imgTurl = '/wgbh/amex/presidents/images/nav_' + imgName + '.gif';
		}
		else {
	  		imgTurl = '/wgbh/amex/presidents/images/nav_off.gif'; 
		}		
   		document.nav.src=imgTurl;
	}
}

function int_nav_on(imgName) {
	var objStr,obj, imgRurl, imgTurl;
	if(document.images) {
	  		objStr = 'document.m_' + imgName;
      		obj = eval(objStr);
      		imgTurl = '/wgbh/amex/presidents/images/nav_' + imgName + '.gif';
      		document.nav.src=imgTurl;
	}
}

function swapr(srcName, imgName) {
	var objStr,obj, imgRurl, imgTurl;
	if(document.images) {
	  		objStr = 'document.' + srcName;
      		obj = eval(objStr);
      		imgTurl = '/wgbh/amex/presidents/images/' + imgName;
      		obj.src=imgTurl;
	}
}

function swap_home(srcName, imgName) {
	var objStr,obj, imgRurl, imgTurl;
	if(document.images) {
	  		objStr = 'document.' + srcName;
      		obj = eval(objStr);
      		imgTurl = '/wgbh/amex/presidents/homeimages/' + imgName;
      		obj.src=imgTurl;
	}
}

function nav_off(imgName) {
	var objStr,obj, imgRurl, imgTurl;
	if(document.images) {
		if(imgName){
	  		objStr = 'document.m_' + imgName;
      		obj = eval(objStr);
      		imgTurl = '/wgbh/amex/presidents/images/nav_' + imgName + '.gif';
		}
		else {
	  		imgTurl = '/wgbh/amex/presidents/images/nav_off.gif'; 
		}		
   		document.nav.src=imgTurl;
	}
}

function nav_on(imgName) {
	var objStr,obj, imgRurl, imgTurl;
	if(document.images) {
	  		objStr = 'document.m_' + imgName;
      		obj = eval(objStr);
      		imgTurl = '/wgbh/amex/presidents/images/nav_' + imgName + '.gif';
      		document.nav.src=imgTurl;
	}
}