// JavaScript Document
var DDSPEED = 20;
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');
	if (c == null) return;
  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';
      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.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;
  }
	if(dist ==0 && d == -1){
		dist = 1;
	}

  c.style.height = currh + (dist * d) + 'px';
  c.style.opacity = currh / c.maxh;
  c.style.filter = 'alpha(opacity=' + (currh * 90 / c.maxh) + ')';
  if((currh < 2 && d != 1) || (currh > (c.maxh - 2) && d == 1)){
    clearInterval(c.timer);
  }
}

function setMenuStyle(obj,bool){
	var f=document.getElementById(obj);
	if(bool == true){
		f.style.color="#FFF";
	}else{
		f.style.color="#bf520f";
	}
}
function setStyle(obj,bool){
	var f=document.getElementById(obj);
	if(bool == true){
		f.style.color="#FFF";
		f.style.backgroundImage="/img/p/aboutus/letter_bg_over.png";
	}else{
		f.style.color="#9a9a9a";
		f.style.backgroundImage="/img/p/aboutus/letter_bg.png";
	}
}
/**get DOM obj*/


/**clear all select*/
function unckboxsel(objname){
	var code_Values = document.all[objname];
	if(code_Values.length){
		for(var i=0;i<code_Values.length;i++)
		{
			code_Values[i].checked = false;
		}
	}else{
		code_Values.checked = false;
	}
}

/**select  all*/
function ckboxsel(objname){
	var code_Values = document.all[objname];
	if(code_Values.length){
		for(var i=0;i<code_Values.length;i++)
		{
			code_Values[i].checked = true;
		}
	}else{
		code_Values.checked = true;
	}
}

/**post all need select*/
function ckboxval(objname,hiddenobj){

	var ckboxall='';
	var logckbox = document.getElementsByName(objname);
	var str;
 	for(var i=0;i<logckbox.length;i++){
		if(logckbox[i].checked){
		 	ckboxall = ckboxall	+	logckbox[i].value	+	",";
		}
	}
	str	=	ckboxall.substring(0,ckboxall.length-1);
	document.getElementById(hiddenobj).value=str;
}