function Tab(n) 
{
   for (i=1;i<=7;i++)
   {
     document.getElementById("s"+i).className="tab-2";
     document.getElementById("tab"+i).style.display='none';
   }
     document.getElementById("s"+n).className="tab-1";
     document.getElementById("tab"+n).style.display='';
}
function Tabl(n) 
{
   for (j=1;j<=4;j++)
   {
     document.getElementById("ss"+j).className="tabl-2";
     document.getElementById("tabl"+j).style.display='none';
   }
     document.getElementById("ss"+n).className="tabl-1";
     document.getElementById("tabl"+n).style.display='';
}

function checkform()
{
	var tel=document.all.tel.value
	var fax=document.all.fax.value
	var user=document.all.user.value
	var email=document.all.email.value
	var reg=/(^[0-9]{3,4}\-[0-9]{7,8}$)|(^[0-9]{7,8}$)|(^\([0-9]{3,4}\)[0-9]{3,8}$)|(^0{0,1}13[0-9]{9}$)/; 
    if(user == "") {alert("请输入您的姓名");return false;}
    if(email!=""){if(document.all.email.value.indexOf("@")==-1){alert("Email 输入有误！");return false;}}
	if(tel==""){alert("电话没输入");return false;}else if(reg.test(tel)==false){alert("电话或手机输入有误！");return false;}
	if(fax!=""){if(reg.test(fax)==false){alert("传真输入有误！");return false;}}
	document.proform.submit()//提交表单
}