var lang=function(){	
	var l=document.getElementById('idx_lang');
	
	var lang_o=function(){
		if(this.src.search("_o.gif")==-1)this.src=this.src.replace('.gif','_o.gif');
	}
	var lang_ou=function(){
		if(this.src.search("_o.gif")!=-1)this.src=this.src.replace('_o.gif','.gif');
	}
	
	if(l){
		var img=l.getElementsByTagName('img');
		for(var i=0;i<img.length;i++){
			img[i].onmouseover=lang_o;
			img[i].onmouseout=lang_ou;
		}
	}
}

var mnav=function(num){
	var m=document.getElementById('mnav');
	if(m){
		var a=m.getElementsByTagName('a');
		a[num].className='sel';
		m.style.backgroundPosition=95*num+'px 0';
	}
}

//咨询检测
function check(){
	var f=document.getElementById('Form1');
	if(f.name.value==""){
		alert('请填写姓名!');
		f.name.focus();
		return false;
	}
	if(f.com.value==""){
		alert('请填写公司!');
		f.com.focus();
		return false;
	}
	if(f.tel.value==""){
		alert('请填写电话号码!');
		f.tel.focus();
		return false;
	}
	if(f.email.value==""){
		alert('请填写电子邮箱!');
		f.email.focus();
		return false;
	}
}
function en_check(){
	var f=document.getElementById('Form1');
	if(f.name.value==""){
		alert('Please fill in your name!');
		f.name.focus();
		return false;
	}
	if(f.com.value==""){
		alert('Please fill in your company!');
		f.com.focus();
		return false;
	}
	if(f.tel.value==""){
		alert('Please fill in your phone number!');
		f.tel.focus();
		return false;
	}
	if(f.email.value==""){
		alert('Please fill in your E-mail!');
		f.email.focus();
		return false;
	}
}