// JavaScript Document

var checkflag = "false";
function check(field) {
	if (checkflag == "false") {
		if(isNaN(field.length)){
			field.checked=true;
		}else{
			for (i = 0; i < field.length; i++) { 
				field[i].checked = true;
			}
		}
		checkflag = "true"; 
		return "取消全选"; 
	} else {
		if(isNaN(field.length)){
			field.checked=false;
		}else{
			for (i = 0; i < field.length; i++) { 
				field[i].checked = false; 
			}
		}
		checkflag = "false"; 
		return "选中全部"; 
	}
}

function DrawImage(ImgD,w){ 
 var image=new Image(); 
 image.src=ImgD.src; 
 if(image.width>0 && image.height>0){ 
  if(image.width/image.height>= 1){ 
   if(image.width>w){
    ImgD.width=w; 
    ImgD.height=(image.height*w)/image.width; 
   }else{ 
    ImgD.width=image.width;
    ImgD.height=image.height; 
   } 
  } 
  else{ 
   if(image.height>w){
    ImgD.height=w; 
    ImgD.width=(image.width*w)/image.height; 
   }else{ 
    ImgD.width=image.width;
    ImgD.height=image.height; 
   } 
  } 
 }
} 

function AddFavorite(sURL, sTitle)
{
    try
    {
        window.external.addFavorite(sURL, sTitle);
    }
    catch (e)
    {
        try
        {
            window.sidebar.addPanel(sTitle, sURL, "");
        }
        catch (e)
        {
            alert("加入收藏失败，请使用Ctrl+D进行添加");
        }
    }
}

function SetHome(obj,vrl){
	try{
		obj.style.behavior='url(#default#homepage)';obj.setHomePage(vrl);
}
catch(e){
		if(window.netscape) {
			try {
				netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
			}
			catch (e) {
				alert("此操作被浏览器拒绝！\n请在浏览器地址栏输入“about:config”并回车\n然后将 [signed.applets.codebase_principal_support]的值设置为'true',双击即可。");
			}
			var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch);
			prefs.setCharPref('browser.startup.homepage',vrl);
		 }
	}
}