function menuItem(imageName,width,height,url){
  this.image = imgdir + imageName + '.gif';
  this.width = width;
  this.height = height;
  this.name = imageName;
  if (url != "") {
    this.url = urldir + url;
  } else {
    this.url = url;
  }
}

var imsMenu = new Array();

imsMenu[0] = new menuItem("imsmenu_01",13,15,"");
imsMenu[1] = new menuItem("imsmenu_02",59,15,"about.htm");
imsMenu[2] = new menuItem("imsmenu_03",12,15,"");
imsMenu[3] = new menuItem("imsmenu_04",38,15,"people.htm");
imsMenu[4] = new menuItem("imsmenu_05",12,15,"");
imsMenu[5] = new menuItem("imsmenu_06",122,15,"prognsem.htm");
imsMenu[6] = new menuItem("imsmenu_07",11,15,"");
imsMenu[7] = new menuItem("imsmenu_08",71,15,"membership.htm");
imsMenu[8] = new menuItem("imsmenu_09",11,15,"");
imsMenu[9] = new menuItem("imsmenu_10",69,15,"publications.htm");
imsMenu[10] = new menuItem("imsmenu_11",11,15,"");
imsMenu[11] = new menuItem("imsmenu_12",65,15,"vizinfo.htm");
imsMenu[12] = new menuItem("imsmenu_13",13,15,"");
imsMenu[13] = new menuItem("imsmenu_14",60,15,"contactus.htm");
imsMenu[14] = new menuItem("imsmenu_15",11,15,"");
imsMenu[15] = new menuItem("imsmenu_16",31,15,"links.htm");
imsMenu[16] = new menuItem("imsmenu_17",21,15,"");

var mfNum = imsMenu.length;


for( i = 0 ; i < mfNum ; i++ ){
  if (imsMenu[i].url != "") {
    var imgname = imsMenu[i].name;
    var imgon  = "r" + imgname + "on";
    var imgoff = "r" + imgname + "off";
    eval(imgon  + " = new Image()");
    eval(imgon  + ".src = '" + imgdir + imgname + "_on.gif'");
    eval(imgoff + " = new Image()");
    eval(imgoff + ".src = '" + imgdir + imgname + ".gif'");
  }
}

function over(imname){
  eval("document." + imname + ".src = r" + imname + "on.src");
  return true;
}

function out(imname){
  eval("document." + imname + ".src = r" + imname + "off.src");
  return true;
}

function imsMenuBar(){
  with (document) {
   for( i = 0 ; i < mfNum ; i++ ){
     if (imsMenu[i].url != "") {
       writeln('<td><a href=' + imsMenu[i].url + ' onMouseOver=over("' + imsMenu[i].name + '") onMouseOut=out("' + imsMenu[i].name + '")>');
       writeln('<img name=' + imsMenu[i].name + ' src=' + imsMenu[i].image + ' width=' + imsMenu[i].width + ' height=' + imsMenu[i].height +' border="0"></a></td>');
     } else {
       writeln('<td><img name=' + imsMenu[i].name +' src='+ imsMenu[i].image + ' width=' + imsMenu[i].width + ' height=' + imsMenu[i].height +' border="0"></td>');
     }
   }
  }
}

function zapto(oSelect)
{	vURL=oSelect.options[oSelect.selectedIndex].value;
	if( vURL != '0' )	
		window.location.href=vURL;
    oSelect.selectedIndex=0;
    return;
}