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📄 基础知识.htm

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd">
<!-- saved from url=(0040)http://bbs.ca800.com/detail.asp?id=50355 -->
<HTML xmlns="http://www.w3.org/1999/xhtml"><HEAD><TITLE>中国自动化网论坛</TITLE>
<META http-equiv=Content-Type content="text/html; charset=gb2312"><LINK 
href="基础知识.files/css.css" type=text/css rel=stylesheet>
<SCRIPT type=text/javascript>
function subwin(loadpos,target,width,height)
{
	var newWindow=null
	if(!newWindow||newWindow.closed)
		newWindow=window.open(loadpos,"sendmessage","resizable,scrollbars,dependent,width=500,height=400");
	else
		newWindow.focus();
}
</SCRIPT>

<META content="MSHTML 6.00.2900.3059" name=GENERATOR></HEAD>
<BODY>
<TABLE style="MARGIN-BOTTOM: 5px" cellSpacing=0 cellPadding=0 width=765 
align=center border=0>
  <TBODY>
  <TR>
    <TD>
      <SCRIPT language=JavaScript type=text/javascript>
<!--
function chks(){
	if(srch.query.value=='' || srch.query.value=='关键字'){
		alert('请输入搜索关键字!');
		return false;}
	//srch.submit();
	//return true;

	for(var i=0;i<document.getElementById("stype").options.length;i++){
		if(document.getElementById("stype").options[i].selected==true){
			//alert(document.getElementById("stype").options[i].value);
			switch (document.getElementById("stype").options[i].value){
				case "company" :
					document.getElementById("srch").action="http://so.ca800.com/SearchCompany.aspx";
					break;
				case "product" :
					document.getElementById("srch").action="http://so.ca800.com/SearchProduct.aspx";
					break;
				case "supply" :
					document.getElementById("srch").action="http://so.ca800.com/SearchSupply.aspx";
					break;
				case "news" :
					document.getElementById("srch").action="http://so.ca800.com/SearchNews.aspx";
					break;
				case "apply" :
					document.getElementById("srch").action="http://so.ca800.com/SearchApply.aspx";
					break;
				case "download" :
					document.getElementById("srch").action="http://so.ca800.com/SearchDownload.aspx";
					break;
					case "all" :
					document.getElementById("srch").action="http://so.ca800.com/Searchall.aspx";
					break;
			}
		}
	}
}
//function goto_search(id) {
//srch.action ="http://s.ca800.com/goto.asp?id="+ id;
//srch.submit();
//-->
                        </SCRIPT>
      <LINK href="基础知识.files/main.css" type=text/css rel=stylesheet>
      <DIV id=topWidth>
      <DIV id=topSearch>
      <FORM id=srch name=srch method=get><INPUT class=inputstyle 
      onmouseover=javascript:this.select(); size=13 value=关键字 name=query> 
      <SELECT id=stype name=stype> <OPTION value=all selected>选择</OPTION> 
        <OPTION value=company>厂商</OPTION> <OPTION value=product>产品</OPTION> 
        <OPTION value=supply>供求</OPTION> <OPTION value=news>新闻</OPTION> <OPTION 
        value=apply>应用</OPTION> <OPTION value=download>下载</OPTION></SELECT> <INPUT 
      onclick="return chks()" type=image src="基础知识.files/search.gif" border=0 
      name=image> </FORM></DIV>
      <DIV id=topMenu1><A class=whitelink href="http://www.ca800.com/">首页</A> <A 
      class=whitelink href="http://www.ca800.com/company/">企业</A> <A 
      class=whitelink href="http://www.ca800.com/product/">产品</A> <A 
      class=whitelink href="http://www.ca800.com/supply/">供求</A> <A 
      class=whitelink href="http://www.ca800.com/apply/">文库</A> <A 
      class=whitelink href="http://www.ca800.com/download/">下载</A> <A 
      class=whitelink href="http://www.ca800.com/news/">新闻</A> <A 
      class=whitelink 
      href="http://www.ca800.com/news/list.asp?category=11">专访</A> <A 
      class=whitelink href="http://www.ca800.com/redian/">热点追踪</A> <A 
      class=whitelink href="http://www.ca800.com/leader/">管理</A> <A 
      class=whitelink href="http://www.ca800.com/hr/">人才</A> <A class=whitelink 
      href="http://www.ca800.com/book/">图书</A> <A class=whitelink 
      href="http://www.ca800.com/train/"></A><A class=whitelink 
      href="http://www.ca800.com/expo/">会展</A> <A class=whitelink 
      href="http://jifen.ca800.com/">积分</A> <A class=whitelink 
      href="http://dv.ca800.com/">视频</A> <A class=whitelink 
      href="http://bbs.ca800.com/" target=_blank>论坛</A> <A class=whitelink 
      href="http://s.ca800.com/">CA800搜索</A></DIV></DIV>
      <DIV id=topWidth>
      <DIV id=topLogo><A href="http://www.ca800.com/"><IMG height=50 
      src="基础知识.files/ca800logo_new.gif" width=140 border=0></A></DIV>
      <DIV id=topMenu2>
      <LI><A class=toplink href="http://www.ca800.com/products/inv/">变频器</A> <A 
      class=toplink href="http://www.ca800.com/products/plc/">P L 
      C</A>&nbsp;&nbsp;<A class=toplink 
      href="http://www.ca800.com/products/servo/">伺服系统</A> <A class=toplink 

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