function checkpr()
{
if (document.getElementById("contect").value==""){
	alert('请输入搜索内容!');document.userinfo.shu.focus();
	return false;
	}
	else if (document.getElementById("contect").value=="输入关键字"){
	alert('请输入搜索内容!');document.userinfo.shu.focus();
	return false;
	}
	else{
  window.location.href='product_3.asp?contect='+document.getElementById("contect").value;
	}
}

function checkst()
{
  window.location.href=document.getElementById("select").value;
}

function checkfeedback()
{
if (feedbackinfo.feedbackusername.value==""){alert('请填写您的姓名!');document.feedbackinfo.feedbackusername.focus();return false;}
if (feedbackinfo.feedbacksubject.value==""){alert('您没有填写邮编!');document.feedbackinfo.feedbacksubject.focus();return false;}
if (feedbackinfo.feedbacktel.value==""){alert('请填写您的电话!');document.feedbackinfo.feedbackusername.focus();return false;}
if (feedbackinfo.feedback.value==""){alert('请填写您的地址!');document.feedbackinfo.feedbackusername.focus();return false;}
if (feedbackinfo.feedbackemail.value.length<7){alert('请输入正确的email地址!');document.feedbackinfo.feedbackemail.focus();return false;}
if (feedbackinfo.feedbackemail.value.indexOf("@")==-1){alert('请输入正确的email地址!');document.feedbackinfo.feedbackemail.focus();return false;}
if (feedbackinfo.feedbackemail.value.indexOf("@")<2){alert('请输入正确的email地址!');document.feedbackinfo.feedbackemail.focus();return false;}
if (feedbackinfo.feedbackemail.value.indexOf(".")==-1){alert('请输入正确的email地址!');document.feedbackinfo.feedbackemail.focus();return false;}
if (feedbackinfo.feedbackemail.value.indexOf(".")<5){alert('请输入正确的email地址!');document.feedbackinfo.feedbackemail.focus();return false;}
if (feedbackinfo.feedbackcontent.value==""){alert('请填写反馈内容!');document.feedbackinfo.feedbackcontent.focus();return false;}
}

function checkorder()
{
if (feedbackinfo.m_name.value==""){alert('请填写您的姓名!');document.feedbackinfo.m_name.focus();return false;}
if (feedbackinfo.m_dw.value==""){alert('您没有填写单位!');document.feedbackinfo.m_dw.focus();return false;}
if (feedbackinfo.m_tel.value==""){alert('请填写您的电话!');document.feedbackinfo.m_tel.focus();return false;}
if (feedbackinfo.m_dj.value==""){alert('请填写您的地址!');document.feedbackinfo.m_dj.focus();return false;}
if (feedbackinfo.m_yp.value==""){alert('请填写您的邮编!');document.feedbackinfo.m_yp.focus();return false;}
if (feedbackinfo.m_mail.value.length<7){alert('请输入正确的email地址!');document.feedbackinfo.m_mail.focus();return false;}
if (feedbackinfo.m_mail.value.indexOf("@")==-1){alert('请输入正确的email地址!');document.feedbackinfo.m_mail.focus();return false;}
if (feedbackinfo.m_mail.value.indexOf("@")<2){alert('请输入正确的email地址!');document.feedbackinfo.m_mail.focus();return false;}
if (feedbackinfo.m_mail.value.indexOf(".")==-1){alert('请输入正确的email地址!');document.feedbackinfo.m_smail.focus();return false;}
if (feedbackinfo.m_mail.value.indexOf(".")<5){alert('请输入正确的email地址!');document.feedbackinfo.m_mail.focus();return false;}
if (feedbackinfo.m_pr.value==""){alert('请填写产品!');document.feedbackinfo.m_pr.focus();return false;}
}