/*
Author: mg12
Update: 2008/11/13
Author URI: http://www.neoease.com/
changes by Xu.hel
*/
//<a href="#" onclick="goTop();return false;">Go Top</a>
(function(){
function $(id){return document.getElementById(id);}
function setStyleDisplay(id,status){$(id).style.display=status;}
function goTop(acceleration,time){
	acceleration=acceleration||0.1;
	time=time||16;
	var dx=0;
	var dy=0;
	var bx=0;
	var by=0;
	var wx=0;
	var wy=0;
	if (document.documentElement){
		dx=document.documentElement.scrollLeft||0;
		dy=document.documentElement.scrollTop||0;
	}
	if (document.body){
		bx=document.body.scrollLeft||0;
		by=document.body.scrollTop||0;
	}
	var wx=window.scrollX||0;
	var wy=window.scrollY||0;
	var x=Math.max(wx,Math.max(bx,dx));
	var y=Math.max(wy,Math.max(by,dy));
	var speed=1+acceleration;
	window.scrollTo(Math.floor(x/speed),Math.floor(y/speed));
	if(x>0||y>0){
		var invokeFunction="istoJS.goTop("+acceleration+","+time+")"
		window.setTimeout(invokeFunction,time);
	}
}
function switchTab(showPanels,hidePanels,activeTab,activeClass,fadeTab,fadeClass){
	$(activeTab).className=activeClass;
	$(fadeTab).className=fadeClass;
	var panel,panelList;
	panelList=showPanels.split(',');
	for(var i=0;i<panelList.length;i++){
		var panel=panelList[i];
		if($(panel)){setStyleDisplay(panel,'block');}
	}
	panelList=hidePanels.split(',');
	for(var i=0;i<panelList.length;i++){
		panel=panelList[i];
		if($(panel)){setStyleDisplay(panel,'none');}
	}
}
function loadCommentShortcut(){
	$('comment').onkeydown=function(moz_ev){
		var ev=null;
		if(window.event){ev=window.event;}else{ev=moz_ev;}
		if(ev!=null&&ev.ctrlKey&&ev.keyCode==13){$('submit').click();}
	}
}
function getElementsByClassName(className,tag,parent){
	parent=parent||document;
	var allTags=(tag=='*'&&parent.all)?parent.all:parent.getElementsByTagName(tag);
	var matchingElements=new Array();
	className=className.replace(/\-/g,'\\-');
	var regex=new RegExp('(^|\\s)'+className+'(\\s|$)');
	var element;
	for(var i=0;i<allTags.length;i++){
		element=allTags[i];
		if(regex.test(element.className)){matchingElements.push(element);}
	}
	return matchingElements;
}
window['istoJS']={};
window['istoJS']['$']=$;
window['istoJS']['setStyleDisplay']=setStyleDisplay;
window['istoJS']['goTop']=goTop;
window['istoJS']['switchTab']=switchTab;
window['istoJS']['loadCommentShortcut']=loadCommentShortcut;
window['istoJS']['getElementsByClassName']=getElementsByClassName;
})();