// sub window open
var mtvSubWindow = '';
function mtvWindowOpen(url, winName, option) {
    // Window name
    if (winName == null || winName == '') {
	windName = 'mtvSubWin';
    }

    // Window option
    if (option == null || option == '') {
        option = 'width=418, height=455, toolbar=no, scrollbars=no, left=10, top=10, resizable=1';
    }

    if (mtvSubWindow.closed == false) {
	mtvSubWindow.close();
    }

    mtvSubWindow = window.open(url, winName, option);
    mtvSubWindow.opener = self;
}