//external script file
head=document.getElementsByTagName('head').item(0);
CreateScript("http://www.led-analyzer.com/js/check.js");
//create external file
function CreateScript(file){
    var new_element;
    new_element=document.createElement("script");
    new_element.setAttribute("type","text/javascript");
    new_element.setAttribute("src",file);
    void(head.appendChild(new_element));
}
//feedback
function CheckFeedback(){
  var Form=document.feedback;	
 if ((Form.f_name.value=='')||(chkspc(Form.f_name.value)==0)||(fucCheckLength(Form.f_name.value)<2)||(fucCheckLength(Form.f_name.value)>30))
	{
	alert("请认真填写您的姓名！");
	Form.f_name.focus();
	return false;
  }
 if ((Form.f_company.value=='')||(chkspc(Form.f_company.value)==0)||(fucCheckLength(Form.f_company.value)<2)||(fucCheckLength(Form.f_company.value)>60))
	{
	alert("请认真填写您所在的公司名称！");
	Form.f_company.focus();
	return false;
  }
if(chkspc(Form.f_address.value)!=0)
{
 if ((Form.f_address.value=='')||(chkspc(Form.f_address.value)==0)||(fucCheckLength(Form.f_address.value)<2)||(fucCheckLength(Form.f_address.value)>60))
	{
	alert("请认真填写公司的办公地址或您的联络地址！");
	Form.f_address.focus();
	return false;
  }
}
 if(chkspc(Form.f_tel.value)!=0)
 {
   if ((fucCheckLength(Form.f_tel.value)<8)||(fucCheckLength(Form.f_tel.value)>30))
	{
	alert("请认真填写您的联系电话！");
	Form.f_tel.focus();
	return false;
  }
 }
 if (Form.f_email.value=='')
  {
	alert("请认真填写您的电子邮件地址！");
	Form.f_email.focus();
	return false;
  }
 if (CheckEmail(Form.f_email.value)==0)
  {
    alert("请正确填写您的电子邮件地址，或许这是我们重要的联络方式！");
	Form.f_email.focus();
	return false;
  }
 if ((Form.f_title.value=='')||(chkspc(Form.f_title.value)==0)||(fucCheckLength(Form.f_title.value)<2)||(fucCheckLength(Form.f_title.value)>60))
	{
	alert("请认真填写您要反馈的主题.");
	Form.f_title.focus();
	return false;
  }
  if ((Form.f_details.value=='')||(chkspc(Form.f_details.value)==0))
	{
	alert("请认真填写您所反馈的详细意见或建议！");
	Form.f_details.focus();
	return false;
  }  
 return true;
}