function validate(){
    if (document.form1.txtname.value=="")
    {
      alert("Please Enter Name " );
      document.form1.txtname.focus();
      return false;
    }
 if (document.form1.txtemail.value=="")
    {
      alert("please enter your Email Id" );
      document.form1.txtemail.focus();
      return false;
    }
 if (invalidemail(document.form1.txtemail.value))
    {
  
  alert("Email address should be of type 'abc@pqr.some extention' ");
       document.form1.txtemail.focus();
       return false;
    }
	 if (document.form1.txtaddress.value=="")
    {
      alert("Please enter your address" );
      document.form1.txtaddress.focus();
      return false;
    }	
		 if (document.form1.txtcountry.value=="")
    {
      alert("Please enter country" );
      document.form1.txtcountry.focus();
      return false;
    }	
	if (document.form1.txtphone.value=="")
    {
      alert("please enter your telephone number " );
      document.form1.txtphone.focus();
      return false;
    }
	 if(isNaN(document.form1.txtphone.value))
  {
    alert("Telephone number should be entered in numbers");
    document.form1.txtphone.value="";
    document.form1.txtphone.focus();
    return false; 
 }
  	 if (document.form1.txtinfo.value=="")
    {
      alert("Please enter your Query" );
      document.form1.txtinfo.focus();
      return false;
    }
document.form1.submit();
}

function invalidemail(s)
{
  res=0;
  len=s.length;

   for(i=0;i<len;i++)
     { 
       if(s.charAt(i)=='@' )
	 
   for(j=i;j<len;j++)
            {
              if(s.charAt(j)=='.')
                  res=1;
	
             }
     }  
if (res==0)
    return true; 
  else
     return false; 
   
}