javascript 验证表单 正则表达式

//**************      trim space     *******************//
//name:      Trim
//target:    Trim left/right space
//Parameter: str
//return:    (str)
function Trim(str){   
 return str.replace(/(^\s*)|(\s*$)/g,"");
}
//**************      check number     *******************//
//name:      fucCheckNUM
//target:    isnumber
//Parameter: NUM
//return:    is true,no false;
function fucCheckNUM(NUM){
  var i,j,strTemp;
  strTemp="0123456789";
     if ( NUM.length== 0){
   return false;
  }
  for (i=0;i<NUM.length;i++){
   j=strTemp.indexOf(NUM.charAt(i));
         if (j==-1){
              return false;
         }
     }
     return true;
}
//**************      check String     *******************//
//name:      chksafe
//target:    filter `!@#$%^&*()<>?:;"'{}[]+=-_|\
//Parameter: strString
//return:    true,false;
function chksafe(strString)
{
 var myReg = /[\`\!\@\#\$\%\^\&\*\(\)\<\>\?\:\;\"\'\{\}\[\]\+\=\-\_\|\\]/;
 if(myReg.test(strString)){
  return true;
 }
 return false;
}
//**************      check date     *******************//
//name:      Date
//target:    judgement Date
//Parameter: strDate
//return:    1,0;
function chkdate(strDate){
  var strLength;
  if (strDate != "")
    strLength= strDate.length ;
  else
    strLength=0;  
  var tmpy="";
  var tmpm="";
  var tmpd="";
  var status=0;
  if ( strLength== 0){
   return 0;
  }
  for (i=0;i<strLength;i++){
     if (strDate.charAt(i)== '-'){
    status++;
    }
    if (status>2){
     return 0;
    }
    if ((status==0) && (strDate.charAt(i)!='-')){
     tmpy=tmpy+strDate.charAt(i)
    }
    if ((status==1) && (strDate.charAt(i)!='-')){
     tmpm=tmpm+strDate.charAt(i)
    }
    if ((status==2) && (strDate.charAt(i)!='-')){
     tmpd=tmpd+strDate.charAt(i)
    }
  }
  year=new String (tmpy);
  month=new String (tmpm);
  day=new String (tmpd)
  if ((tmpy.length!=4) || (tmpm.length>2) || (tmpd.length>2)){
   //alert("Invalid format of date!");
     return 0;
  }
  if (!((1<=month) && (12>=month) && (31>=day) && (1<=day)) ){
   //alert ("Invalid month or day!");
        return 0;
  }
  if (!((year % 4)==0) && (month==2) && (day==29)){
   //alert ("This is not a leap year!");
        return 0;
  }
  if ((month<=7) && ((month % 2)==0) && (day>=31)){
   //alert ("This month is a small month!");
        return 0;
  }
  if ((month>=8) && ((month % 2)==1) && (day>=31)){
   //alert ("This month is a small month!");
        return 0;
  }
  if ((month==2) && (day==30)){
   //alert("The Febryary never has this day!");
        return 0;
  }
  return 1;
}
//**************      isPic     *******************//
//name:      isPic
//target:    judgement path
//Parameter: filePath
//return:    true,false;
function isPic(filePath){
 var temp;
 var ExtList = ".jpg.gif.bmp.png";
 var the_ext = filePath.substr(filePath.lastIndexOf(".")+1).toLowerCase();
 if (ExtList.indexOf(the_ext)==-1){
  return false;
 }
 return true;
}
//**************      chkWebsites     *******************//
//name:      chkWebsites
//target:    judgement Websites
//Parameter: strWeb
//return:    true,false;
function chkWebsites(strEmail) {
  var myReg = /^(http:\/\/[a-z0-9]{1,5}\.)+([-\/a-z0-9]+\.)+[a-z0-9]{2,4}$/;
  if(myReg.test(strEmail)) return true;
  return false;
}
//**************      strlen     *******************//
//name:      strlen
//target:    judgement length
//Parameter: str,num
//return:    true,false;
function strlen(str,num){
 if(str > num){
  return true;
 }
 return false;
}

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