function sub()
    {
        if(document.form1.txtwy.value.length==0)
        {  
            $(document).ready(function(){
        $("#wy").css("display","");
        });
            document.form1.txtwy.focus();
            return false;
        }
        else
        {
            $(document).ready(function(){
        $("#wy").css("display","none");
        });
        }
        
       if(!isNumber(document.form1.txtjg.value))  {  
         $(document).ready(function(){
        $("#jg").css("display","");
        });
        document.form1.txtjg.focus();
        return  false;
        }
        else
        {
            $(document).ready(function(){
        $("#jg").css("display","none");
        });
        }
        
        if(!isNumber(document.form1.txtdoor.value))  {  
         $(document).ready(function(){
        $("#door").css("display","");
        });
        document.form1.txtdoor.focus();
        return  false;
        }
        else
        {
            $(document).ready(function(){
        $("#door").css("display","none");
        });
        }
        
         if(!isNumber(document.form1.txtArea.value))  {  
         $(document).ready(function(){
        $("#Area").css("display","");
        });
        document.form1.txtArea.focus();
        return  false;
        }
        else
        {
            $(document).ready(function(){
        $("#Area").css("display","none");
        });
        }
        
         if(!isNumber(document.form1.txttime.value))  {  
         $(document).ready(function(){
        $("#time").css("display","");
        });
        document.form1.txttime.focus();
        return  false;
        }
        else
        {
            $(document).ready(function(){
        $("#time").css("display","none");
        });
        }
        
        if(document.form1.phone.value.length==0)  {  
         $(document).ready(function(){
        $("#kong").css("display","");
        });
        document.form1.phone.focus();
        return false;
        }
        else
        {
            $(document).ready(function(){
        $("#kong").css("display","none");
        });
        }
        
        if(!isPhone(document.form1.phone.value))  {  
         $(document).ready(function(){
        $("#ph").css("display","");
        });
        document.form1.phone.focus();
        return false;
        }
        else
        {
            $(document).ready(function(){
        $("#ph").css("display","none");
        });
        }
        
        if(!isEmail(document.form1.mail.value))  {  
            $(document).ready(function(){
            $("#mai").css("display","");
            });
        document.form1.mail.focus();
        return  false;
        }
        else
        {
            $(document).ready(function(){
            $("#mai").css("display","none");
            });
        }

         document.getElementById("form1").method="POST";
         document.getElementById("form1").action="http://163.foloda.com/sumHouse/zk_163_1.aspx";
         document.getElementById("form1").submit();
    }
    
    function  isNumber(String)
{  
var  Letters  =  "1234567890"; 
var  i;
var  c;
for(i=0;i<String.length;i++)
{  
c=String.charAt(i);
if(Letters.indexOf(c)  <  0)
return false;
}
return true;
}

function  isPhone(String)
{  
var Letters="1234567890-";  
var i;
var c;
if(String.charAt(0)=='-')
return false;
if(String.charAt(String.length-1)=='-')
return false;
for(i=0;i<String.length;i++)
{  
c=String.charAt(i);
if(Letters.indexOf(c)<0)
return false;
}
return true;
}

function isEmail(strEmail) {
if(strEmail.length==0)
{
return true;
}
if(strEmail.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1)
{
return true;
}
else
{
return false;
}
}