function write_top(pagename,dir){
var pagename = pagename || 'top_1';
var dir = dir || '';
document.write('<img src="'+ dir +'images/'+ page +'.jpg" name="top" width="780" height="162" border="0" />');
}

function write_intro(dir){
var dir = dir || '';
document.write('<img src="'+ dir +'images/intro.jpg" name="intro" width="780" height="390" border="0" usemap="#introMap" id="intro" />');
}