window.name = "mainwin";

browser = navigator.appName;
ie = "Microsoft Internet Explorer";
netscape = "Netscape";
os = navigator.platform;
mac = 'MacPPC'
browserVer=parseInt(navigator.appVersion); 

var tabs = ["SLIDERAD"];


function show(tab) {
        if (document.getElementById) {
                document.getElementById(tab).style.visibility = 'visible';
        }	
        else if (browser == netscape  && browserVer <5) {
                document.layers[tab].visibility = 'visible';
        }
        else if (browser == ie || (browser == netscape && browserVer >=5)) {
                document.all[tab].style.visibility = 'visible';
    }
}
function hide(tab) {
        if (document.getElementById) {
                document.getElementById(tab).style.visibility = 'hidden';
        }	
        else if (browser == netscape  && browserVer <5 ) {
                document.layers[tab].visibility = 'hidden';
        }	
        else if (browser == ie || (browser == netscape && browserVer >=5)) {
                document.all[tab].style.visibility = 'hidden';
        }
}
function display(tab) {
        for (var i = 0; i < tabs.length; i++) {
                if (tabs[i] == tab) {
                        show(tabs[i]);
                }
                else {
                        hide(tabs[i]);
                }
        }
}


browser = navigator.appName;
ie = "Microsoft Internet Explorer";
netscape = "Netscape";
var NS4up =  (document.getElementById && ! document.all) ?1: 0 ;


//Declaring variables for setting and manipulating navigation
var navActive   //Name of active navigation
var timerID     //Timer variable

//Creating a custom object called nav with the methods "name" and "menuExist"
function nav(name, menuExist) {
    this.name = name;
    this.menuExist = menuExist;
}

//Array of all navigation objects with variables "name" and "menuExist"
navItem = new Array()
navItem[0] = new nav('layer1', 'yes');
navItem[1] = new nav('layer2', 'yes');
navItem[2] = new nav('layer3', 'yes');
navItem[3] = new nav('layer4', 'yes');
navItem[4] = new nav('layer5', 'yes');
navItem[5] = new nav('layer6', 'yes');
navItem[6] = new nav('layer7', 'yes');
navItem[7] = new nav('layer8', 'yes');
navItem[8] = new nav('layer9', 'yes');

// ****增加新的数据库分类，还要修改style.css里层的样式规定。



//Simple function to turn on a <DIV>
function showMenu(navInput) {

    if (browser == netscape && browserVer <5) {
        document.layers['M' + navInput].visibility = 'visible';
    }
    else if (browser == ie || (browser == netscape && browserVer >=5) ) {
        //document.all['M' + navInput].style.visibility = 'visible';
        document.getElementById('M'+navInput).style.visibility = 'visible';
    }
}

//Simple function to turn off a <DIV>
function hideMenu(navInput) {
    if (browser == netscape && browserVer <5 ) {
        document.layers['M' + navInput].visibility = 'hidden';
    }
    else if (browser == ie || (browser == netscape && browserVer >=5)) {
        //document.all['M' + navInput].style.visibility = 'hidden';
        document.getElementById('M'+navInput).style.visibility = 'hidden';
    }
}



function activateMenu(navInput) {
    stopTimer()
    for (i = 0; i < navItem.length; i++) {
        if (navItem[i].name == navInput) {
                if (navItem[i].menuExist == 'yes') {
                showMenu(navItem[i].name);
            }
        }
        else {
            if (navItem[i].menuExist == 'yes') {
                hideMenu(navItem[i].name);
            }
        }
    }
}

function setTimer(navInput) {
    for (i = 0; i < navItem.length; i++) {
        if (navItem[i].name == navInput && navItem[i].menuExist == 'yes') {
            navActive = navItem[i].name;
            timerID = setTimeout('hideMenu(navActive)', 1000);
        }
        else if (navItem[i].name == navInput) {
            navActive = navItem[i].name;
            timerID = setTimeout('hideMenu(navActive)', 1000);
        }
    }
}

function stopTimer() {
    clearTimeout(timerID);
}
function addLink()
{
  var str = prompt('输入添加的链接地址:', 'http://');
  if ((str != null) && (str != 'http://'))
  {
    document.theForm.comments.value = document.theForm.comments.value+'<A href='+str+'>'+str+'</a>';
    document.theForm.comments.focus(); 
  }
  
  return true;
}