function clearbox() {
document.form1.companyname.value="";
document.form1.contactperson.value="";
document.form1.contacttel.value="";
document.form1.contactfax.value="";
document.form1.contactemail.value="";
document.form1.contactadd.value="";
document.form1.contacturl.value="";
document.form1.feedbackdesc.value="";
}

function check_feedbackform()
{
	if(document.form1.CompanyName.value=="")
	{
		alert("Please enter your company name.");
		document.form1.CompanyName.select();
		return false;
	}
	
	if(document.form1.Phone.value=="")
	{
		alert("Please enter tel.");
		document.form1.Phone.select();
		return false;
	}
	if(document.form1.Subject.value=="")
	{
		alert("Please enter subject.");
		document.form1.Subject.select();
		return false;
	}
	if(document.form1.Email.value=="")
	{
		alert("Please enter email.");
		document.form1.Email.select();
		return false;
	}
	if(document.form1.Comments.value=="")
	{
		alert("Please enter Comments.");
		document.form1.Comments.select();
		return false;
	}
	if(document.form1.Email.value.length !=0)
   {
	  	   
   if(/^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/.exec(document.form1.Email.value)==null)
     {
      alert("Email Error!");
      document.form1.Email.select();
      return false;
     } 
   }
	return true;
}

function check_signin()
{
	if(document.form1.username.value.length<4||document.form1.username.value.length>12)
	{
	  alert("4-12 length");
	  document.form1.username.select();
	  return false;
	 }
  if(document.form1.pwd.value.length<4||document.form1.pwd.value.length>12)
	{
	  alert("4-12 length");
	  document.form1.pwd.select();
	  return false;
	}
	return true;	

}

function check_keyword()
{
	if(document.form1.head_top_strKeyword.value=="")
	{
		alert("Please enter product item or name!");
		document.form1.head_top_strKeyword.select();
		return false;
	}
	if(document.form1.head_top_strKeyword.value.length >30)
	{
		alert("1-30 length");
		document.form1.head_top_strKeyword.value="";
		document.form1.head_top_strKeyword.select();
		
		return false;
		
	}
	
	return true;
}