/* ---------------------------------------------------------------------
JavaScript for Whogot Inc.
FileName: common.js
--------------------------------------------------------------------- */


// *** OS
var UA = navigator.userAgent;
var osWin = (UA.indexOf("Win", 0) != -1);
var osMac = (UA.indexOf("Mac", 0) != -1);


// *** browser
var brwOpera = (UA.indexOf('Opera') != -1);
var brwIE = (UA.indexOf('MSIE') != -1) && !brwOpera;
var brwFirefox = (UA.indexOf('Firefox') != -1);
var brwSafari = (UA.indexOf('Safari') != -1);
var brwGecko = (UA.indexOf('Gecko') != -1) && !(UA.indexOf('like Gecko') != -1);
var brwNetscape = (UA.indexOf('Netscape') != -1);


// *** browser type check
var brwType = 0;
if(UA.indexOf('MSIE') != -1 && UA.indexOf('Opera') == -1){
	var st = UA.indexOf("MSIE") + 5;
	var en = UA.indexOf(";", st);
	var verIE = Number(UA.substring(st, en));
	
	if(verIE < 5.5) brwType = 1; // gif
	else if(5.5 <= verIE && verIE < 7) brwType = 2; // filter PNG
	else brwType = 3; // transparent PNG
	if(UA.indexOf('Win') == -1) brwType = 1; // gif
} else {
	brwType = 3; // transparent PNG
}
UA = undefined;


// *** method
function DW(htmlSrc){document.write(htmlSrc);}
function DWL(htmlSrc){document.writeln(htmlSrc);}


// *** add preload object
var preLoadObj = new Array();

function addPreLoad(imgObj){
	preLoadObj = preLoadObj.concat(imgObj);
}


// *** image preload
function imgPreLoad(){
	preLoadImg = new Array();
	for(var i = 0; i < preLoadObj.length; i++){
		preLoadImg[i] = new Image();
		preLoadImg[i].src = preLoadObj[i];
	}
}


// *** image preload - initialize
addPreLoad(new Array(
	'/common/img/navi_index_on.gif',
	'/common/img/navi_service_on.gif',
	'/common/img/navi_works_on.gif',
	'/common/img/navi_company_on.gif',
	'/common/img/navi_recruit_on.gif',
	'/common/img/navi_contact_on.gif',
	'/common/img/btn_pagetop_on.gif'
));


// *** image over
function imgChange(imgObj){
	var imgSrc = imgObj.src;
	var imgStatus = imgSrc.indexOf("_on") != -1;
	if(!imgStatus){
		var P = imgSrc.lastIndexOf(".");
		imgSrc = imgSrc.substr(0, P) + '_on' + imgSrc.substring(P);
	} else {
		imgSrc = imgSrc.replace('_on', '');
	}
	imgObj.src = imgSrc;
}


// *** location path check
var catName = '';
function locationPathCheck(){
	var path = location.pathname;
	var en = path.indexOf("/", 1) - 1;
	catName = path.substr(1, en);
}
locationPathCheck();


// *** background set
function bgSet(){
	var bgImg = '';
	var targetID = document.getElementById('container');
	if(targetID == undefined) return;
	if(catName == 'service') targetID.style.backgroundImage = 'url(/common/img/bg_01.jpg)';
	if(catName == 'works') targetID.style.backgroundImage = 'url(/common/img/bg_02.jpg)';
	if(catName == 'company') targetID.style.backgroundImage = 'url(/common/img/bg_03.jpg)';
	if(catName == 'recruit') targetID.style.backgroundImage = 'url(/common/img/bg_04.jpg)';
	if(catName == 'contact') targetID.style.backgroundImage = 'url(/common/img/bg_05.jpg)';
}


// *** page top scroll
function pageTopScroll(){
	var x1 = x2 = x3 = 0; 
	var y1 = y2 = y3 = 0; 
	if(document.documentElement){
		x1 = document.documentElement.scrollLeft || 0;
		y1 = document.documentElement.scrollTop || 0;
	}
	if (document.body){
		x2 = document.body.scrollLeft || 0;
		y2 = document.body.scrollTop || 0;
	}
	x3 = window.scrollX || 0;
	y3 = window.scrollY || 0;
	var x = Math.max(x1, Math.max(x2, x3));
	var y = Math.max(y1, Math.max(y2, y3)); 
	window.scrollTo(Math.floor(x / 1.3), Math.floor(y / 1.3));
	if(x > 0 || y > 0){
		window.setTimeout("pageTopScroll()", 30);
	}
}


// *** onload event
window.onload = function(){
	imgPreLoad();
	bgSet();
}