/*
-----------------------------------------------------------
	en_common.js
	(C)2008 Sony Corp., Sony.
	(C)2008 groovesync, inc.

-----------------------------------------------------------
*/

//=========================================================
/* Public Functions */

//---------------------------------------------------------
// Window Operation

function v_open_popup(url,w,h,scr,opt,name) {
	if( !scr ) scr = "no";
	return v_open_window(url,name,opt+",scrollbars="+scr+",width="+w+",height="+h);
}

function v_open_window(url,name,opt) {
	if( !name ) {
		var d = new Date();
		name = "v_win"+d.getTime();
	}
	var win = window.open(url,name,opt);
	win.opener = top;
	win.focus();
	return win;
}

function v_open_main(url,cls){
	if( !top.opener || top.opener.closed ) {
		top.opener = v_open_window(url,"","directories=1,location=1,menubar=1,scrollbars=1,status=1,toolbar=1,resizable=1");
	} else {
		top.opener.top.location = url;
	}
	top.opener.focus();
	if( cls ) close();
}

function v_close(){
	if( top.opner ) top.opener.focus();
	top.close();
}


//---------------------------------------------------------
// Document Scroll

function vScrollToTop() {
	vScrollTo(0);
}

function vScrollToObj( id ) {
	var y = _v_GetObjPosY(id);
	vScrollTo( y );
}

function vScrollTo( y ) {
	if( _v_scrollTimer ) clearInterval( _v_scrollTimer );
	_v_scrollToY = y;
	_v_scrollLastY = _v_GetScrollPosY();
	_v_scrollTimer = setInterval( '_v_ScrollDo();', 15 );
}


//=========================================================
/* Private Functions */

//Document Scroll
var _v_scrollToY;
var _v_scrollLastY;
var _v_scrollTimer;

function _v_ScrollDo() {
	var d = _v_scrollLastY - _v_scrollToY;
	var done = false;
	if( Math.abs(d)<1 ) {
		done = true;
		_v_scrollLastY = _v_scrollToY;
	} else if( _v_GetScrollPosY() != Math.floor(_v_scrollLastY) ) done = true;
	else _v_scrollLastY -= d / 6;
	self.scrollTo( 0, Math.floor(_v_scrollLastY) );
	if( done ) {
		clearInterval( _v_scrollTimer );
		_v_scrollTimer = null;
	}
}

function _v_GetScrollPosY() {
	if( _Ie ) return document.body.scrollTop;
	return self.pageYOffset;
}

function _v_GetObjPosY( id ) {
	var o = vGetObj(id);
	if( document.getElementById ) return o.offsetTop;
	if( _Ie ) return o.style.pixelTop;
	return o.top;
}

//---------------------------------------------------------
// Select menu Jump

function vJumpMenuItem( obj ){
	if ( obj.value ){
		top.location.href = obj.value;
	} else {
		return true;
	}
}


//=========================================================
/* Public functions */

function vGetObj(id) {
	var d = document;
	if( d.getElementById ) return d.getElementById( id );
	if( d.all ) d.all( id );
	return d[id];
}

//---------------------------------------------------------
/* Swap image */

function vSwapImg() {
	for( var i=0; i<arguments.length; i+=2 )
		vGetObj(arguments[i]).src = arguments[i+1];
}

function vPreload() {
	for( var i=0; i<arguments.length; i++ )
		_v_NewImg(arguments[i]);
}

//---------------------------------------------------------
/* Roll over */

//Preload
function vPreloadOvOt() {
	_v_PreloadImg( vPreloadOvOt.arguments, "_ov" );
	_v_PreloadImg( vPreloadOvOt.arguments, "_ot" );
}

function vPreloadOv() {
	_v_PreloadImg( vPreloadOv.arguments, "_ov" );
}

function vObjPreloadOvOt(obj) {
	if( obj._preloaded ) return;
	obj._preloaded = true;
	_v_PreloadImgObj( obj, "_ov" );
	_v_PreloadImgObj( obj, "_ot" );
}

function vObjPreloadOv(obj) {
	if( obj._preloaded ) return;
	obj._preloaded = true;
	_v_PreloadImgObj( obj, "_ov" );
}

//Swap
function vImgOv() {
	_v_SwapImg( vImgOv.arguments, "_ov" );
}

function vImgOt() {
	_v_SwapImg( vImgOt.arguments, "_ot" );
}

function vImgOf() {
	_v_SwapImg( vImgOf.arguments, "" );
}


function vObjOv( obj ) {
	_v_SwapImgObj( obj, "_ov" );
}

function vObjOt( obj ) {
	_v_SwapImgObj( obj, "_ot" );
}

function vObjOf( obj ) {
	_v_SwapImgObj( obj, "" );
}

//---------------------------------------------------------
/* Random Image */

function vRandomImage( id, ary )
{
	var i = 1, c = 0, m = 0, k, o;
	while( ary[i] ) {
		m += ary[i+4];
		i += 5;
	}
	k = Math.random() * m;
	m = 0; i = 1;
	while( ary[i] ) {
		m += ary[i+4];
		if( m > k ) break;
		i += 5;
	}
	ary[i+4] = 0;
	o = vGetObj( id );
	o.src = ary[0]+ary[i];
	o.alt = ary[i+2];
	o.title = ary[i+3];
	o = vGetObj( id+"_a" );
	if( o ) {
		o.href = ary[i+1];
	}
}

//=========================================================
/* Private functions */

function _v_SwapImg( arg, ext ) {
	for( var i=0; i<arg.length; i++ ) {
		_v_SwapImgObj( vGetObj(arg[i]), ext );
	}
}

function _v_SwapImgObj( obj, ext ) {
	var file = obj.src.match(/(.+)_o[nvt](\..{3})$/);
	if( !file ) file = obj.src.match(/(.+)(\..{3})$/);
	obj.src = file[1] + ext + file[2];
}

function _v_PreloadImg( arg, ext ) {
	for( var i=0; i<arg.length; i++ ) {
		var obj = vGetObj( arg[i] );
		_v_PreloadImgObj( obj, ext );
	}
}

function _v_PreloadImgObj( obj, ext ) {
	var file = obj.src.match(/(.+)_o[nvt](\..{3})$/);
	if( !file ) file = obj.src.match(/(.+)(\..{3})$/);
	_v_NewImg( file[1] + ext + file[2] );
}

function _v_NewImg(src) {
	var d = document;
	if( !d._v_preImg ) d._v_preImg = new Array();
	return ( ( d._v_preImg[ d._v_preImg.length ] = new Image() ).src = src );
}