// setHomepage   
function setHomepage(web_url){
	if(document.all){
		document.body.style.behavior = 'url(#default#homepage)';
		document.body.setHomePage(web_url);
	}else if(window.sidebar){
		if(window.netscape){
			try{
				netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
			}catch(e){
				alert("The operation was refused by browser,if you want to enable this feature, please enter in the address column 'about:config', then, change 'signed.applets.codebase_principal_support' to 'true'.");   
			}
		}
		var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch);
		prefs.setCharPref('browser.startup.homepage',web_url);
	}
}

// addfavorite   
function AddFavorite(sTitle, sURL)
{
	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 tab_change(tab_id){
	if(tab_id==1){
		document.getElementById('tab1').style.color='#BF2121';
		document.getElementById('tab2').style.color='#626262';
		document.getElementById('tab3').style.color='#626262';
		document.getElementById("tab1").style.backgroundImage = "url(/syd/images/tab01.jpg)";
		document.getElementById("tab2").style.backgroundImage = "url(/syd/images/tab02.jpg)";
		document.getElementById("tab3").style.backgroundImage = "url(/syd/images/tab02.jpg)";
		document.getElementById('tab_content1').style.display='block';
		document.getElementById('tab_content2').style.display='none';
		document.getElementById('tab_content3').style.display='none';
	}
	
	if(tab_id==2){
		document.getElementById('tab1').style.color='#626262';
		document.getElementById('tab2').style.color='#BF2121';
		document.getElementById('tab3').style.color='#626262';
		document.getElementById("tab1").style.backgroundImage = "url(/syd/images/tab02.jpg)";
		document.getElementById("tab2").style.backgroundImage = "url(/syd/images/tab01.jpg)";
		document.getElementById("tab3").style.backgroundImage = "url(/syd/images/tab02.jpg)";
		document.getElementById('tab_content1').style.display='none';
		document.getElementById('tab_content2').style.display='block';
		document.getElementById('tab_content3').style.display='none';
	}

	if(tab_id==3){
		document.getElementById('tab1').style.color='#626262';
		document.getElementById('tab2').style.color='#626262';
		document.getElementById('tab3').style.color='#BF2121';
		document.getElementById("tab1").style.backgroundImage = "url(/syd/images/tab02.jpg)";
		document.getElementById("tab2").style.backgroundImage = "url(/syd/images/tab02.jpg)";
		document.getElementById("tab3").style.backgroundImage = "url(/syd/images/tab01.jpg)";
		document.getElementById('tab_content1').style.display='none';
		document.getElementById('tab_content2').style.display='none';
		document.getElementById('tab_content3').style.display='block';
	}
}

function check_feed(){
	if(document.myform.name.value==''){
		alert('Please fill in your name!');
		document.myform.name.focus();
		return false;
	}	
	if(document.myform.tel.value==''){
		alert('Email address can not be empty!');
		document.myform.tel.focus();
		return false;
	}	
	if(document.myform.fax.value==''){
		alert('Please fill in your contact telephone!');
		document.myform.fax.focus();
		return false;
	}	
	if(document.myform.content.value==''){
		alert('Message content can not be empty!');
		document.myform.content.focus();
		return false;
	}	
}