function contraer(item) {
	obj=document.getElementById(item);
	obj.style.display="none";
}
function expandir(item) {
	obj=document.getElementById(item);
	obj.style.display="block";
}

function sys_msgbox_deactivate() {
	obj=document.getElementById('sys_msgbox_content');
	obj.style.display = "none";
	obj=document.getElementById('sys_msgbox_bg_layer');
	obj.style.visibility = "hidden";
}

function sys_msgbox_activate() {
	obj=document.getElementById('sys_msgbox_bg_layer');
	obj.style.left=0;
	obj.style.top=0;
	obj.style.width="100%";
	obj.style.height=document.body.scrollHeight+"px";
	obj.style.visibility = "";
}

function sys_msgbox_content_center(x,y) {
	
	if (typeof window.innerWidth != 'undefined'){
			widthViewport= window.innerWidth;
			heightViewport= window.innerHeight;
	}else if(typeof document.documentElement != 'undefined' && typeof document.documentElement.clientWidth !='undefined' && document.documentElement.clientWidth != 0){
			widthViewport=document.documentElement.clientWidth;
			heightViewport=document.documentElement.clientHeight;
	}else{
			widthViewport= document.getElementsByTagName('body')[0].clientWidth;
			heightViewport=document.getElementsByTagName('body')[0].clientHeight;
	}
	obj=document.getElementById('sys_msgbox_content');
	obj.style.top = (heightViewport/2)-(y/2)-20+"px";
	obj.style.left = (widthViewport/2)-(x/2)-20+"px";
}

function sys_xajax_call_function(php_function, form) {
	document.getElementById('siguiente').style.display = "none";
	document.getElementById('espere').style.display = "block";
	eval('xajax_'+php_function+"(xajax.getFormValues('"+form+"'))");
}




var TimeToFade = 1000.0;

function fade(eid)
{
  var element = document.getElementById(eid);
  if(element == null)
    return;
   
  if(element.FadeState == null)
  {
    if(element.style.opacity == null
        || element.style.opacity == ''
        || element.style.opacity == '1')
    {
      element.FadeState = 2;
    }
    else
    {
      element.FadeState = -2;
    }
  }
   
  if(element.FadeState == 1 || element.FadeState == -1)
  {
    element.FadeState = element.FadeState == 1 ? -1 : 1;
    element.FadeTimeLeft = TimeToFade - element.FadeTimeLeft;
  }
  else
  {
    element.FadeState = element.FadeState == 2 ? -1 : 1;
    element.FadeTimeLeft = TimeToFade;
    setTimeout("animateFade(" + new Date().getTime() + ",'" + eid + "')", 33);
  }  
}

function animateFade(lastTick, eid)
{  
  var curTick = new Date().getTime();
  var elapsedTicks = curTick - lastTick;
 
  var element = document.getElementById(eid);
 
  if(element.FadeTimeLeft <= elapsedTicks)
  {
    element.style.opacity = element.FadeState == 1 ? '1' : '0';
    element.style.filter = 'alpha(opacity = '
        + (element.FadeState == 1 ? '100' : '0') + ')';
    element.FadeState = element.FadeState == 1 ? 2 : -2;
    return;
  }
 
  element.FadeTimeLeft -= elapsedTicks;
  var newOpVal = element.FadeTimeLeft/TimeToFade;
  if(element.FadeState == 1)
    newOpVal = 1 - newOpVal;

  element.style.opacity = newOpVal;
  element.style.filter = 'alpha(opacity = ' + (newOpVal*100) + ')';
 
  setTimeout("animateFade(" + curTick + ",'" + eid + "')", 33);
}