// function.js (c) 2000-2001 IPRO 網際家數位科技 All Rights Reserved. 
//                 http://www.iprodigi.com  service@iprodigi.com.tw
//
// 軟體使用授權:
//
// 此程式僅授權 聯合光纖通信(UFO Communication)公司 使用於該公司企業網站上，
// 未經網際家數位科技正式授權，請勿任意複製作為其它用途。
// 
//

var ie4=document.all&&navigator.userAgent.indexOf("Opera")==-1
var ns6=document.getElementById&&!document.all
var ns4=document.layers
var curObj;

function showmenu(e,which,ppX,ppY){
    
    if (!document.all&&!document.getElementById&&!document.layers)
        return

    clearhidemenu()

    menuobj=ie4? document.all.popmenu : ns6? document.getElementById("popmenu") : ns4? document.popmenu : ""
    menuobj.thestyle=(ie4||ns6)? menuobj.style : menuobj

    if (ie4||ns6)
        menuobj.innerHTML=which
    else{
        menuobj.document.write('<layer name=gui bgColor=#E6E6E6 width=165 onMouseOver="clearhidemenu()" onMouseOut="hidemenu()">'+which+'</layer>')
        menuobj.document.close()
    }

    menuobj.contentwidth=(ie4||ns6)? menuobj.offsetWidth : menuobj.document.gui.document.width
    menuobj.contentheight=(ie4||ns6)? menuobj.offsetHeight : menuobj.document.gui.document.height
/*    
    eventX=ie4? event.clientX : ns6? e.clientX : e.x
    eventY=ie4? event.clientY : ns6? e.clientY : e.y
    
    //Find out how close the mouse is to the corner of the window
    var rightedge=ie4? document.body.clientWidth-eventX : window.innerWidth-eventX
    var bottomedge=ie4? document.body.clientHeight-eventY : window.innerHeight-eventY
    
    //if the horizontal distance isn't enough to accomodate the width of the context menu
    if (rightedge<menuobj.contentwidth)
    //move the horizontal position of the menu to the left by it's width
        menuobj.thestyle.left=ie4? document.body.scrollLeft+eventX-menuobj.contentwidth : ns6? window.pageXOffset+eventX-menuobj.contentwidth : eventX-menuobj.contentwidth
    else
    //position the horizontal position of the menu where the mouse was clicked
        menuobj.thestyle.left=ie4? document.body.scrollLeft+eventX : ns6? window.pageXOffset+eventX : eventX
    
    //same concept with the vertical position
    if (bottomedge<menuobj.contentheight)
        menuobj.thestyle.top=ie4? document.body.scrollTop+eventY-menuobj.contentheight : ns6? window.pageYOffset+eventY-menuobj.contentheight : eventY-menuobj.contentheight
        
    else
        menuobj.thestyle.top=ie4? document.body.scrollTop+event.clientY : ns6? window.pageYOffset+eventY : eventY
    */    
    
    if (ie4){
        menuobj.thestyle.left=ppX;
        menuobj.thestyle.top= ppY;
    }else if (ns6){
        menuobj.thestyle.left=ppX;
        menuobj.thestyle.top= ppY-6;
    }else{
        menuobj.thestyle.left=ppX;
        menuobj.thestyle.top= ppY-6;
    }

    menuobj.thestyle.visibility="visible";
    return false;
}

function contains_ns6(a, b) {
//Determines if 1 element in contained in another- by Brainjar.com
    while (b.parentNode)
        if ((b = b.parentNode) == a)
            return true;
    return false;
}

function hidemenu(){
    if (window.menuobj)
        menuobj.thestyle.visibility=(ie4||ns6)? "hidden" : "hide"
}

function dynamichide(e){
    if (ie4&&!menuobj.contains(e.toElement))
        hidemenu()
    else if (ns6&&e.currentTarget!= e.relatedTarget&& !contains_ns6(e.currentTarget, e.relatedTarget))
    hidemenu()
}

function delayhidemenu(){
    if (ie4||ns6||ns4)
        delayhide=setTimeout("hidemenu()",500)
}

function clearhidemenu(){
    if (window.delayhide)
        clearTimeout(delayhide)
}

function highlightmenu(e,state){
    if (document.all)
        source_el=event.srcElement
    else if (document.getElementById)
        source_el=e.target
    if (source_el.className=="menuitems"){
        source_el.id=(state=="on")? "mouseoverstyle" : ""
    }else{
        while(source_el.id!="popmenu"){
            source_el=document.getElementById? source_el.parentNode : source_el.parentElement
            if (source_el.className=="menuitems"){
                source_el.id=(state=="on")? "mouseoverstyle" : ""
            }
        }
    }
}

if (ie4||ns6)
    document.onclick=hidemenu