function Checkform()
{
	if (document.orderform.company.value =="" ){
		alert ("请输入公司名称！");
		document.orderform.company.focus();
		return false;
	}
	
	if (document.orderform.Cname.value =="" ){
		alert ("请输入客户姓名！");
		document.orderform.Cname.focus();
		return false;
	}
	
	if (document.orderform.tel.value =="" ){
		alert ("请输入联系电话！");
		document.orderform.tel.focus();
		return false;
	}
	
	if (document.orderform.tel.value =="" ){
		alert ("请输入联系电话！");
		document.orderform.tel.focus();
		return false;
	}
	
    if(document.orderform.email.value.length!=0)
     {
       if (document.orderform.email.value.charAt(0)=="." ||        
            document.orderform.email.value.charAt(0)=="@"||       
            document.orderform.email.value.indexOf('@', 0) == -1 || 
            document.orderform.email.value.indexOf('.', 0) == -1 || 
            document.orderform.email.value.lastIndexOf("@")==document.orderform.email.value.length-1 || 
            document.orderform.email.value.lastIndexOf(".")==document.orderform.email.value.length-1)
        {
         alert("Email地址格式不正确！");
         document.orderform.email.focus();
         return false;
         }
      }
    else
     {
      alert("Email不能为空！");
      document.orderform.email.focus();
      return false;
      }

	
	
	if (document.orderform.content.value.length =="" ){
		alert ("请输入留言内容！");
		document.orderform.content.focus();
		return false;
	}

 }