var GSFN;

if(GSFN == undefined) {
  GSFN = {};
  
  GSFN.gId = function(id) {
    return document.getElementById(id);
  };

  GSFN.hasClassName = function(element, className) {
    var elementClassName = element.className;

    return (elementClassName.length > 0 && (elementClassName == className ||
      new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
  };

  GSFN.addClassName = function(element, className) {
    if (!GSFN.hasClassName(element, className))
      element.className += (element.className ? ' ' : '') + className;
    return element;
  };

  GSFN.removeClassName = function(element, className) {
    var newClass = GSFN.strip(element.className.replace(new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' '));
    element.className = newClass;
    return element;
  };

  GSFN.strip = function(string) {
    return string.replace(/^\s+/, '').replace(/\s+$/, '');
  };
}

GSFN.feedback = function(url, tab_options) {
  this.empty_url = "https://s3.amazonaws.com/getsatisfaction.com/feedback/transparent.gif";
  this.feedback_url = url;
  this.tab_options = tab_options ? tab_options : {};
  this.tab_options.placement = this.tab_options.placement ? this.tab_options.placement : 'left';
  this.tab_options.color = this.tab_options.color ? this.tab_options.color : '#222';
  
  /*
  this.tab_html = '<div id="feedButton" style="display:visible"> '+
                      //'<a href="#" id="fdbk_tab" class="fdbk_tab_'+this.tab_options.placement+'" style="background-color:'+this.tab_options.color+'">FEEDBACK</a>' +
					  '</div>'
	*/				
	this.tab_html = '<a href="#" id="fdbk_tab" class="fdbk_tab_'+this.tab_options.placement+'" style="background-color:'+this.tab_options.color+'">FEEDBACK</a>';
  this.overlay_html = '<div id="fdbk_overlay" style="display:none">' +
                        '<div id="fdbk_container">' +
                          '<a href="#" onclick="GSFN.hide();return false" id="fdbk_close"></a>' +
                          '' +
                        '</div>' +
                        '<div id="fdbk_screen"></div>' +
                      '</div>';
                      
  if(this.tab_options.container) {
    var container_el = this.gId(this.tab_options.container);
    container_el.innerHTML = this.tab_html + this.overlay_html;
  } else {
    document.write(this.tab_html);
    document.write(this.overlay_html);      
  }                   

  this.gId('fdbk_tab').onclick = function() { GSFN.show(); return false; }
  this.gId('fdbk_iframe').setAttribute("src", this.empty_url);
};

GSFN.set_position = function() {
  this.scroll_top = document.documentElement.scrollTop || document.body.scrollTop;
  this.scroll_height = document.documentElement.scrollHeight;
  this.client_height = window.innerHeight || document.documentElement.clientHeight;
  this.gId('fdbk_screen').style.height = this.scroll_height+"px";
 
  this.gId('fdbk_container').style.top = this.scroll_top+(this.client_height*0.1)+"px";
};

GSFN.show = function() {
  this.gId('fdbk_iframe').setAttribute("src", this.feedback_url);
  if (this.gId('fdbk_iframe').addEventListener) {
    this.gId('fdbk_iframe').addEventListener("load", GSFN.loaded, false);
  } else if (this.gId('fdbk_iframe').attachEvent) {
    this.gId('fdbk_iframe').attachEvent("onload", GSFN.loaded);
  }
  this.set_position();
  
  GSFN.addClassName(document.getElementsByTagName('html')[0], 'feedback_tab_on');
  this.gId('fdbk_overlay').style.display = "block";
};
  
GSFN.hide = function() {
  if (GSFN.gId('fdbk_iframe').addEventListener) {
    GSFN.gId('fdbk_iframe').removeEventListener("load", GSFN.loaded, false);
  } else if (GSFN.gId('fdbk_iframe').attachEvent) {
    GSFN.gId('fdbk_iframe').detachEvent("onload", GSFN.loaded);
  }
  this.gId('fdbk_overlay').style.display = "none";
  this.gId('fdbk_iframe').setAttribute("src", this.empty_url);
  GSFN.gId('fdbk_iframe').className = "loading";

  GSFN.removeClassName(document.getElementsByTagName('html')[0], 'feedback_tab_on');
};
  
GSFN.loaded = function() {
  GSFN.gId('fdbk_iframe').className = "loaded";
};
GSFN.GetHeight = function()
      {
              var y = 0;
              if (self.innerHeight)
              {
                      y = self.innerHeight;
              }
              else if (document.documentElement && document.documentElement.clientHeight)
              {
                      y = document.documentElement.clientHeight;
              }
              else if (document.body)
              {
                      y = document.body.clientHeight;
              }
              return y;
      }
GSFN.scrollTop=function() {
	return GSFN.f_filterResults (
		window.pageYOffset ? window.pageYOffset : 0,
		document.documentElement ? document.documentElement.scrollTop : 0,
		document.body ? document.body.scrollTop : 0
	);
}
GSFN.f_filterResults=function(n_win, n_docel, n_body) {
	var n_result = n_win ? n_win : 0;
	if (n_docel && (!n_result || (n_result > n_docel)))
		n_result = n_docel;
	return n_body && (!n_result || (n_result > n_body)) ? n_body : n_result;
}
GSFN.getposOffset = function(what, offsettype){
var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
var parentEl=what.offsetParent;
while (parentEl!=null){
totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
parentEl=parentEl.offsetParent;
}
}
GSFN.moveFeedBack =function()
{
	
  this.scroll_top = GSFN.scrollTop();
  this.client_height = GSFN.GetHeight();
  var objid=document.getElementById("fdbk_tab");
  var y=this.scroll_top;
  
// alert(y);
 
  y=y+80;
 objid.style.top=y+"px";

}


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