// preload and turnon/off images

	pic0tlSEbtn_on = new Image(171,26);
	pic0tlSEbtn_on.src = "img/tlbtn_se0mo.png";
	pic0tlSEbtn_off = new Image(171,26);
	pic0tlSEbtn_off.src = "img/tlbtn_se0.png";
	pic1tlSEbtn_on = new Image(171,26);
	pic1tlSEbtn_on.src = "img/tlbtn_se1mo.png";
	pic1tlSEbtn_off = new Image(171,26);
	pic1tlSEbtn_off.src = "img/tlbtn_se1.png";
	pic2tlSEbtn_on = new Image(171,26);
	pic2tlSEbtn_on.src = "img/tlbtn_se2mo.png";
	pic2tlSEbtn_off = new Image(171,26);
	pic2tlSEbtn_off.src = "img/tlbtn_se2.png";
	pic3tlSEbtn_on = new Image(171,26);
	pic3tlSEbtn_on.src = "img/tlbtn_se3mo.png";
	pic3tlSEbtn_off = new Image(171,26);
	pic3tlSEbtn_off.src = "img/tlbtn_se3.png";
	pic4tlSEbtn_on = new Image(171,29);
	pic4tlSEbtn_on.src = "img/tlbtn_se4mo.png";
	pic4tlSEbtn_off = new Image(171,29);
	pic4tlSEbtn_off.src = "img/tlbtn_se4.png";
		
function turnontl(place,imgName) {
      document[place].src= eval(imgName + "_on.src"); 
}

function turnofftl(place,imgName) {
      document[place].src= eval(imgName + "_off.src"); 
}


// assign button displays

	var timeline_se = new Array();
	timeline_se[0] = 'SE1973.html';
	timeline_se[1] = 'SE1973.html';
	timeline_se[2] = 'SE1974-82.html';
	timeline_se[3] = 'SE1982R.html';
	timeline_se[4] = 'SE1983-93.html';
	
	function displaySEtimeline(imgNo) {
		document.write('<a href="'+timeline_se[imgNo]+'" onmouseover="turnontl(\'tlSE'+imgNo+'\',\'pic'+imgNo+'tlSEbtn\')" onmouseout="turnofftl(\'tlSE'+imgNo+'\',\'pic'+imgNo+'tlSEbtn\')"><img src="img/tlbtn_se'+imgNo+'.png" name="tlSE'+imgNo+'" border="0"></a>');
}

	function displaySEtimelinesel(imgNo) {
		document.write('<img src="img/tlbtn_se'+imgNo+'sel.png" border="0"></a>');
}