/*
-----------------------------------------------
Title: 處理網頁視窗的相關函式
Designer: Evan Tung
Modify Date: 2007/4/10
-----------------------------------------------
*/


/* 跳轉到另一個網頁
-----------------------------------------------	*/
function changeURL(url)	{
    window.location.href = url;
}

/*  產生新的彈出視窗
-----------------------------------------------	*/
function makePopup(url,width,height,overflow)
{
    if(width > 800) {width = 800 ;}
    if(height > 600) {height = 600 ;}
    if(overflow == '' || !/^(scroll|resize|both)$/.test(overflow)){
       overflow= 'both';
    }

    var win = window.open(url,'','width=' + width + ',height='
              +height + ',scrollbars=' + (/^(scroll|both)$/.test(overflow) ? 'yes' : 'no')
              + ',resizable=' +(/^(rezise|both)$/.test(overflow) ? 'yes' : 'no')
              + ',status=yes,toolbar=no,menubar=no,location=no,resizable=no' );

    return win;
}

/*  產取得網頁視窗的捲動位置
-----------------------------------------------	*/
function getScrollingPosition(){
    var posttion = [0,0];

    if(typeof window.pageYOffset != 'undefined'){
       position = [window.pageXOffset,window.pageYOffset];
    }

    else if(typeof document.documentElement.scrollTop != 'undefined' && document.documentElement.scrollTop >0){
       position = [document.documentElement.scrollLeft,document.documentElement.scrollTop];
    }

    else if(typeof document.body.scrollTop != 'undefined'){
       position = [document.body.scrollLeft,document.body.scrollTop];
    }

    return position;
}

/*  取得網頁視窗中可用空間的大小
-----------------------------------------------	*/
function getViewportSize(){
    var size = [0,0];
    if(typeof window.innerWidth != 'undefined'){
       size = [window.innerWidth,window.innerHeight];
    }
    else if (typeof document.documentElement != 'undefined'
             && typeof document.documentElement.clientWidth != 'undefined'
             && document.documentElement.clientWidth != 0){
       size = [document.documentElement.clientWidth,document.documentElement.clientHeight];
    }
    else{
       size = [document.getElementsByTagName('body')[0].clientWidth,document.getElementsByTagName('body')[0].clientHeight];
    }

    return size;
}