用 jsp 在客户端生成 javascript 代码来实现表单校验.txt

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      "    document."+formName+"."+inputName+".focus();" + "\n" +
      "    return(false);" + "\n" +
      "  }" + "\n\n";		
  }

  /***************************************************************************\
   *        public: check the telephone number
   *        检查录入框值是否是电话号码
  \***************************************************************************/
  public void telCheck(String inputName, String errorMsg)	{
    this.errorCheckStr +=
      "  if(fucCheckTEL(document."+formName+"."+inputName+".value) == 0) {" + "\n" +
      "    alert(\""+errorMsg+".\");" + "\n" +
      "    document."+formName+"."+inputName+".focus();" + "\n" +
      "    return(false);" + "\n" +
      "  }" + "\n\n";				
  }

  /***************************************************************************\
   *        public: check if the input value contian the prefered string 
   *        检查录入框值是否是包含给定字串
  \***************************************************************************/
  public void stringCheck(String inputName, String errorMsg, String string)	{
    this.errorCheckStr +=
      "  if(document."+formName+"."+inputName+".value.indexOf(\""+string+"\") != 0) {" + "\n" +
      "    alert(\""+errorMsg+".\");" + "\n" +
      "    document."+formName+"."+inputName+".focus();" + "\n" +
      "    return(false);" + "\n" +
      "  }" + "\n\n";		
  }

  /***************************************************************************\
   *        public: check if the input value contain the denyed string 
   *        检查录入框值是否是包含给禁止的字串
  \***************************************************************************/
  public void denyStrCheck(String inputName, String errorMsg, String string)	{
    this.errorCheckStr +=
      "  if (document."+formName+"."+inputName+".value.length == 0 || " + "\n" +
      "    document."+formName+"."+inputName+".value.indexOf(\""+string+"\") != -1) {" + "\n" +
      "    alert(\""+errorMsg+".\");" + "\n" +
      "    document."+formName+"."+inputName+".focus();" + "\n" +
      "    return(false);" + "\n" +
      "  }" + "\n\n";		
  }

  /***************************************************************************\
   *        public: check the YYYY-MM-DD format date
   *        检查录入框值是否是YYYY-MM-DD的日期格式
  \***************************************************************************/
  public void dateCheck(String inputName, String errorMsg)	{
    this.errorCheckStr +=
      "  if(chkdate(document."+formName+"."+inputName+".value) == 0) {" + "\n" +
      "    alert(\""+errorMsg+".\");" + "\n" +
      "    document."+formName+"."+inputName+".focus();" + "\n" +
      "    return(false);" + "\n" +
      "  }" + "\n\n";		
  }

	
  public void neededFunction()	{
    this.errorCheckStr += 						
      "//函数名：fucCheckNUM" + "\n" +
      "//功能介绍：检查是否为数字" + "\n" +
      "//参数说明：要检查的数字" + "\n" +
      "//返回值：1为是数字，0为不是数字" + "\n" +
      "function fucCheckNUM(NUM) {" + "\n" +
      "  var i,j,strTemp;" + "\n" +
      "  strTemp=\"0123456789\";" + "\n" +
      "  if ( NUM.length == 0) return 0;" + "\n" +
      "  for (i=0;i<NUM.length;i++)	{" + "\n" +
      "    j = strTemp.indexOf(NUM.charAt(i));" + "\n" +	
      "    if (j==-1) {" + "\n" +
      "      //说明有字符不是数字" + "\n" +
      "      return 0;" + "\n" +
      "    }" + "\n" +
      "  }" + "\n" +
      "  //说明是数字" + "\n" +
      "  return 1;" + "\n" +
      "}" + "\n\n" +		

      "//函数名：fucCheckLength" + "\n" +
      "//功能介绍：检查字符串的长度" + "\n" +
      "//参数说明：要检查的字符串" + "\n" +
      "//返回值：长度值" + "\n" +
      "function fucCheckLength(strTemp) {" + "\n" +
      "  var i,sum;" + "\n" +
      "  sum=0;" + "\n" +
      "  for(i=0;i<strTemp.length;i++) {" + "\n" +
      "    if ((strTemp.charCodeAt(i)>=0) && (strTemp.charCodeAt(i)<=255))" + "\n" +
      "      sum=sum+1;" + "\n" +
      "    else" + "\n" +
      "      sum=sum+2;" + "\n" +
      "  }" + "\n" +
      "  return sum;" + "\n" +
      "}" + "\n\n" +

      "//函数名：chkemail" + "\n" +
      "//功能介绍：检查是否为Email Address" + "\n" +
      "//参数说明：要检查的字符串" + "\n" +
      "//返回值：0：不是  1：是" + "\n" +
      "function chkemail(a)	{" + "\n" +
      "  var i=a.length;" + "\n" +
      "  var temp = a.indexOf('@');" + "\n" +
      "  var tempd = a.indexOf('.');" + "\n" +
      "  if (temp > 1) {" + "\n" +
      "    if ((i-temp) > 3) {" + "\n" +					
      "      if (tempd!=-1) {" + "\n" +
      "        return 1;" + "\n" +
      "      }" + "\n" +
      "    }" + "\n" +
      "  }" + "\n" +
      "  return 0;" + "\n" +
      "}" + "\n\n" +
    
      "//函数名：fucCheckTEL" + "\n" +
      "//功能介绍：检查是否为电话号码" + "\n" +
      "//参数说明：要检查的字符串" + "\n" +
      "//返回值：1为是合法，0为不合法" + "\n" +
      "function fucCheckTEL(TEL) {" + "\n" +
      "  var i,j,strTemp;" + "\n" +
      "  strTemp=\"0123456789-()#\";" + "\n" +
      "  if (TEL.length == 0) return 0;" + "\n" +
      "  for (i=0;i<TEL.length;i++) {" + "\n" +
      "    j=strTemp.indexOf(TEL.charAt(i));" + "\n" +
      "    if (j==-1) {" + "\n" +
      "      //说明有字符不合法" + "\n" +
      "      return 0;" + "\n" +
      "    }" + "\n" +
      "  }" + "\n" +
      "  //说明合法" + "\n" +
      "  return 1;" + "\n" +
      "}" + "\n\n" +

      "//函数名：chkdate	(YYYY-MM-DD)" + "\n" +
      "//功能介绍：检查是否为日期" + "\n" +
      "//参数说明：要检查的字符串" + "\n" +
      "//返回值：0：不是日期  1：是日期" + "\n" +
      "function chkdate(datestr) {" + "\n" +
      "  var lthdatestr" + "\n" +
      "  if (datestr != \"\")" + "\n" +
      "    lthdatestr= datestr.length ;" + "\n" +
      "  else" + "\n" +
      "    lthdatestr=0;" + "\n" +
      "  var tmpy=\"\";" + "\n" +
      "  var tmpm=\"\";" + "\n" +
      "  var tmpd=\"\";" + "\n" +
      "  //var datestr;" + "\n" +
      "  var status;" + "\n" +
      "  status=0;" + "\n" +
      "  if ( lthdatestr== 0)" + "\n" +
      "    return 0;" + "\n" +
      "  for (i=0;i<lthdatestr;i++) {" + "\n" +
      "    if (datestr.charAt(i)== '-') {" + "\n" +
      "      status++;" + "\n" +
      "    }" + "\n" +
      "    if (status>2) {" + "\n" +
      "      return 0;" + "\n" +
      "    }" + "\n" +
      "    if ((status==0) && (datestr.charAt(i)!='-')) {" + "\n" +
      "      tmpy=tmpy+datestr.charAt(i)" + "\n" +
      "    }" + "\n" +
      "    if ((status==1) && (datestr.charAt(i)!='-')) {" + "\n" +
      "      tmpm=tmpm+datestr.charAt(i)" + "\n" +
      "    }" + "\n" +
      "    if ((status==2) && (datestr.charAt(i)!='-')) {" + "\n" +
      "      tmpd=tmpd+datestr.charAt(i)" + "\n" +
      "    }" + "\n" +
      "  }" + "\n" +
      "  year=new String (tmpy);" + "\n" +
      "  month=new String (tmpm);" + "\n" +
      "  day=new String (tmpd)" + "\n" +
      "  if ((tmpy.length!=4) || (tmpm.length>2) || (tmpd.length>2)) {" + "\n" +
      "    return 0;" + "\n" +
      "  }" + "\n" +
      "  if (!((1<=month) && (12>=month) && (31>=day) && (1<=day)) ) {" + "\n" +
      "    return 0;" + "\n" +
      "  }" + "\n" +
      "  if (!((year % 4)==0) && (month==2) && (day==29)) {" + "\n" +
      "    return 0;" + "\n" +
      "  }" + "\n" +
      "  if ((month<=7) && ((month % 2)==0) && (day>=31)) {" + "\n" +
      "    return 0;" + "\n" +
      "  }" + "\n" +
      "  if ((month>=8) && ((month % 2)==1) && (day>=31)) {" + "\n" +
      "    return 0;" + "\n" +
      "  }" + "\n" +
      "  if ((month==2) && (day==30)) {" + "\n" +
      "    return 0;" + "\n" +
      "  }" + "\n" +
      "  return 1;" + "\n" +
      "}" + "\n\n"; 

  }

  /*public static void main(String[] args) {
    ErrorCheck ec = new ErrorCheck("testFrom");
    String script = ec.ErrorCheckScript();
    System.out.println(script);
  } */	

}