function openPopUp_520x390(href, target)
{
	window.open(href, target, 'width=520, height=390, top=0, toolbar=0, location=0, directories=0, status=1, menuBar=0, scrollBars=1, resizable=0');
	return false;
}
function openPopUp_600x450(href, target)
{
	window.open(href, target, 'width=600, height=450, top=0, toolbar=0, location=0, directories=0, status=1, menuBar=0, scrollBars=1, resizable=0');
	return false;
}
function SymError()
{
	return true;
}
function onlyNumber()
{
	if (event.keyCode < 48 || event.keyCode> 57) event.returnValue = false;
}
function changeSize(elm, _size, class_name)
{
	document.getElementById(elm).className = class_name + ' ' + class_name + '_' + _size;
	Set_Cookie('text_size', _size, 30, '', '', '');
}
function heightOptimizer()
{
	var _height = document.getElementById('base_middle').offsetHeight;

	if(_height < document.getElementById('base_right').offsetHeight)
		_height = document.getElementById('base_right').offsetHeight;

	//if(_height < 600)
	//	_height = 600;

	document.getElementById('base_right').style.height = _height + "px";
	document.getElementById('base_middle').style.height = _height + "px";
}
function artworkDetail(id)
{
	var detail="artwork_detail.php?id=" + id
	document.location.href = detail;
}