12306 史上最烂代码

今天看了一则报道，说明12306网站花费3亿，我真想见识见识3亿的代码到底如何？在首页上看了页面代码，贴出来部份给大家。

function replaceALL(){
	var replaceTxt = document.getElementById("searchwordl").value;
	var relTxt = replaceTxt.replace(/^\s+|\s+$/g,"");
	if(typeof(document.getElementById("searchwordl"))=="undefined"||relTxt==""){
		alert("请输入检索条件");
		document.getElementById("searchwordl").focus();
 		return false;
	}
 if(typeof(document.getElementById("searchwordl"))!="undefined"){
  var searchwordl = document.getElementById('searchwordl').value;

  var sig = 0;
  if(searchwordl.indexOf("'") > -1 || searchwordl.indexOf("\"") > -1 || searchwordl.indexOf("%") > -1 || searchwordl.indexOf("#") > -1 || searchwordl.indexOf("&") > -1 || searchwordl.indexOf("*") > -1 || searchwordl.indexOf("(") > -1 || searchwordl.indexOf(")") > -1 || searchwordl.indexOf("@") > -1 || searchwordl.indexOf("`") > -1 || searchwordl.indexOf("/") > -1 || searchwordl.indexOf("\\") > -1 || searchwordl.indexOf(",") > -1 || searchwordl.indexOf(".") > -1 || searchwordl.indexOf("=") > -1 || searchwordl.indexOf("<") > -1 || searchwordl.indexOf(">") > -1)
  sig = 1;

  searchwordl=searchwordl.replace("'","");  
  //searchwordl=searchwordl.replace(" ","");
  searchwordl=searchwordl.replace("%","");
  searchwordl=searchwordl.replace("#","");
  searchwordl=searchwordl.replace("&","");
  searchwordl=searchwordl.replace("*","");
  searchwordl=searchwordl.replace("(","");
  searchwordl=searchwordl.replace(")","");
  searchwordl=searchwordl.replace("@","");
  searchwordl=searchwordl.replace("`","");
  searchwordl=searchwordl.replace("/","");
  searchwordl=searchwordl.replace("\\","");
  searchwordl=searchwordl.replace(",","");
  searchwordl=searchwordl.replace(".","");
  searchwordl=searchwordl.replace("=","");
  searchwordl=searchwordl.replace("<","");
  searchwordl=searchwordl.replace(">","");
  if(searchwordl == '请输入搜索条件'){
      alert("请输入搜索条件");
      return false;
  }
  if(searchwordl == ''){
      alert("请正确输入搜索条件");
      return false;
  }
  if(sig == 1){
      alert("请正确输入搜索条件");
      return false;
  }
  document.getElementById('searchword').value=searchwordl;
  return true;
  //document.fmsearch.submit();
  }
}

 我真想知道3亿花在哪里，这么稀烂的代码，特别是这下面这段代码

  var sig = 0;
  if(searchwordl.indexOf("'") > -1 || searchwordl.indexOf("\"") > -1 || searchwordl.indexOf("%") > -1 || searchwordl.indexOf("#") > -1 || searchwordl.indexOf("&") > -1 || searchwordl.indexOf("*") > -1 || searchwordl.indexOf("(") > -1 || searchwordl.indexOf(")") > -1 || searchwordl.indexOf("@") > -1 || searchwordl.indexOf("`") > -1 || searchwordl.indexOf("/") > -1 || searchwordl.indexOf("\\") > -1 || searchwordl.indexOf(",") > -1 || searchwordl.indexOf(".") > -1 || searchwordl.indexOf("=") > -1 || searchwordl.indexOf("<") > -1 || searchwordl.indexOf(">") > -1)
  sig = 1;

  searchwordl=searchwordl.replace("'","");  
  //searchwordl=searchwordl.replace(" ","");
  searchwordl=searchwordl.replace("%","");
  searchwordl=searchwordl.replace("#","");
  searchwordl=searchwordl.replace("&","");
  searchwordl=searchwordl.replace("*","");
  searchwordl=searchwordl.replace("(","");
  searchwordl=searchwordl.replace(")","");
  searchwordl=searchwordl.replace("@","");
  searchwordl=searchwordl.replace("`","");
  searchwordl=searchwordl.replace("/","");
  searchwordl=searchwordl.replace("\\","");
  searchwordl=searchwordl.replace(",","");
  searchwordl=searchwordl.replace(".","");
  searchwordl=searchwordl.replace("=","");
  searchwordl=searchwordl.replace("<","");
  searchwordl=searchwordl.replace(">","");
  if(searchwordl == '请输入搜索条件'){
      alert("请输入搜索条件");
      return false;
  }
  if(searchwordl == ''){
      alert("请正确输入搜索条件");
      return false;
  }
  if(sig == 1){
      alert("请正确输入搜索条件");
      return false;
  }
  document.getElementById('searchword').value=searchwordl;

 请问，你不会用正则吗？