var DDSPEED = 8;
var DDTIMER = 15;

// main function to handle the mouse events //
function ddMenu(id,d){
  var h = document.getElementById(id + '-ddheader');
  var c = document.getElementById(id + '-ddcontent');
  clearInterval(c.timer);
  if(d == 1){
    clearTimeout(h.timer);
    if(c.maxh && c.maxh <= c.offsetHeight){return}
    else if(!c.maxh){
      c.style.display = 'block';
      c.style.height = 'auto';
	  if(id=='six')
		{
	    c.style.left='170px';
	  }
      c.maxh = c.offsetHeight;
      c.style.height = '0px';
    }
    c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
  }else{
    h.timer = setTimeout(function(){ddCollapse(c)},50);
  }
}

// collapse the menu //
function ddCollapse(c){
  c.timer = setInterval(function(){ddSlide(c,-1)},DDTIMER);
}

// cancel the collapse if a user rolls over the dropdown //
function cancelHide(id){
  var h = document.getElementById(id + '-ddheader');
  var c = document.getElementById(id + '-ddcontent');
  clearTimeout(h.timer);
  clearInterval(c.timer);
  if(c.offsetHeight < c.maxh && c.offsetHeight > 3){
    c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
  }
}

// incrementally expand/contract the dropdown and change the opacity //
function ddSlide(c,d){
  var currh = c.offsetHeight;
  var dist;
  if(d == 1){
    dist = (Math.round((c.maxh - currh) / DDSPEED));
  }else{
    dist = (Math.round(currh / DDSPEED));
  }
  if(dist <= 1 && d == 1){
    dist = 1;
  }
  c.style.height = currh + (dist * d) + 'px';
  c.style.opacity = currh / (c.maxh * 0.5);
  c.style.filter = 'alpha(opacity=' + (currh * 200 / c.maxh) + ')';
  if((currh < 2 && d != 1) || (currh > (c.maxh - 2) && d == 1)){
    clearInterval(c.timer);
  }
}

function setbg()
{
  if(navigator.appName=="Netscape")
  {
	document.getElementById('tblmaster').background="../images/bgmenubandnetscape.jpg";
	document.layers['tblmaster'].background="../images/bgmenubandnetscape.jpg";
  }
  else
  {
    document.getElementById('tblmaster').background="../images/bgmenuband.jpg";
  }
}

function setbg1()
{
  if(navigator.appName=="Netscape")
  {
	document.getElementById('tblmaster').background="images/bgmenubandnetscape.jpg";
	document.layers['tblmaster'].background="images/bgmenubandnetscape.jpg";
  }
  else
  {
    document.getElementById('tblmaster').background="images/bgmenuband.jpg";
  }
}

/***********     Show email        ************/
var op=0,tid=0;

function showemail()
{
  if(navigator.appName!='Netscape')
	{
      document.getElementById('divemail').filters[0].opacity=op*10;
	}
	else
	{
	  document.getElementById('divemail').style.MozOpacity=op;
	  document.getElementById('divemail').style.opacity=op;
	  document.getElementById('divemail').style.KhtmlOpacity=op;
	}
	document.getElementById('divemail').style.display="block";
	clearInterval(tid);
	tid=setInterval("incop()",100);
}

function incop()
{
  op+=2;
	if(navigator.appName!='Netscape')
	{
      document.getElementById('divemail').filters[0].opacity=op*10;
	}
	else
	{
	  document.getElementById('divemail').style.MozOpacity=op;
	  document.getElementById('divemail').style.opacity=op;
		document.getElementById('divemail').style.KhtmlOpacity=op;
	}
	if(op>=10)
	{
	  clearInterval(tid);
	}
}

function hideemail()
{
  clearInterval(tid);
	tid=setInterval("decop()",100);
}

function decop()
{
  op--;
	if(navigator.appName!='Netscape')
	{
      document.getElementById('divemail').filters[0].opacity=op*10;
	}
	else
	{
	  document.getElementById('divemail').style.MozOpacity=op;
	  document.getElementById('divemail').style.opacity=op;
		document.getElementById('divemail').style.KhtmlOpacity=op;
	}
	if(op<=0)
	{
	  clearInterval(tid);
		document.getElementById('divemail').style.display="none";
	}
}