正则表达式基本语法详解

 //校验纯中文字符 /^[\u4E00-\u9FA5]+$/ [\u4E00-\u9FA5] ：估计是中文字符集的范围吧 以上表达式均在下面的javascript中测试通过   
 规则表达式 ：  (填写/ /之间的表达式) 
 校验字符串 ： 

 //校验是否全由数字组成 function isDigit(s) { var patrn=/^[0-9]{1,20}$/; if (!patrn.exec(s)) return false return true } //校验登录名：只能输入5-20个以字母开头、可带数字、“_”、“.”的字串 function isRegisterUserName(s) { var patrn=/^[a-zA-Z]{1}([a-zA-Z0-9]|[._]){4,19}$/; if (!patrn.exec(s)) return false return true } //校验用户姓名：只能输入1-30个以字母开头的字串 function isTrueName(s) { var patrn=/^[a-zA-Z]{1,30}$/; if (!patrn.exec(s)) return false return true } //校验密码：只能输入6-20个字母、数字、下划线 function isPasswd(s) { var patrn=/^(\w){6,20}$/; if (!patrn.exec(s)) return false return true } //校验普通电话、传真号码：可以“+”开头，除数字外，可含有“-” function isTel(s) { //var patrn=/^[+]{0,1}(\d){1,3}[ ]?([-]?(\d){1,12})+$/; var patrn=/^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$/; if (!patrn.exec(s)) return false return true } //校验手机号码：必须以数字开头，除数字外，可含有“-” function isMobil(s) { var patrn=/^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$/; if (!patrn.exec(s)) return false return true } //校验邮政编码 function isPostalCode(s) { //var patrn=/^[a-zA-Z0-9]{3,12}$/; var patrn=/^[a-zA-Z0-9 ]{3,12}$/; if (!patrn.exec(s)) return false return true } //校验搜索关键字 function isSearch(s) { var patrn=/^[^`~!@#$%^&*()+=|\\\][\]\{\}:;\'\,.<>/?]{1}[^`~!@$%^&()+=|\\\][\]\{\}:;\'\,.<>?]{0,19}$/; if (!patrn.exec(s)) return false return true } function isIP(s) //by zergling { var patrn=/^[0-9.]{1,20}$/; if (!patrn.exec(s)) return false return true } /********************************************************************************* * FUNCTION: isBetween * PARAMETERS: val AS any value * lo AS Lower limit to check * hi AS Higher limit to check * CALLS: NOTHING * RETURNS: TRUE if val is between lo and hi both inclusive, otherwise false. **********************************************************************************/ function isBetween (val, lo, hi) { if ((val  hi)) { return(false); } else { return(true); } } /********************************************************************************* * FUNCTION: isDate checks a valid date * PARAMETERS: theStr AS String * CALLS: isBetween, isInt * RETURNS: TRUE if theStr is a valid date otherwise false. **********************************************************************************/ function isDate (theStr) { var the1st = theStr.indexOf('-'); var the2nd = theStr.lastIndexOf('-'); if (the1st == the2nd) { return(false); } else { var y = theStr.substring(0,the1st); var m = theStr.substring(the1st+1,the2nd); var d = theStr.substring(the2nd+1,theStr.length); var maxDays = 31; if (isInt(m)==false || isInt(d)==false || isInt(y)==false) { return(false); } else if (y.length <4) { return(false); } else if (!isBetween (m, 1, 12)) { return(false); } else if (m==4 || m==6 || m==9 || m==11) maxDays = 30; else if (m==2) { if (y % 4 > 0) maxDays = 28; else if (y % 100 == 0 && y % 400 > 0) maxDays = 28; else maxDays = 29; } if (isBetween(d, 1, maxDays) == false) { return(false); } else { return(true); } } } /********************************************************************************* * FUNCTION: isEuDate checks a valid date in British format * PARAMETERS: theStr AS String * CALLS: isBetween, isInt * RETURNS: TRUE if theStr is a valid date otherwise false. **********************************************************************************/ function isEuDate (theStr) { if (isBetween(theStr.length, 8, 10) == false) { return(false); } else { var the1st = theStr.indexOf('/'); var the2nd = theStr.lastIndexOf('/'); if (the1st == the2nd) { return(false); } else { var m = theStr.substring(the1st+1,the2nd); var d = theStr.substring(0,the1st); var y = theStr.substring(the2nd+1,theStr.length); var maxDays = 31; if (isInt(m)==false || isInt(d)==false || isInt(y)==false) { return(false); } else if (y.length <4) { return(false); } else if (isBetween (m, 1, 12) == false) { return(false); } else if (m==4 || m==6 || m==9 || m==11) maxDays = 30; else if (m==2) { if (y % 4 > 0) maxDays = 28; else if (y % 100 == 0 && y % 400 > 0) maxDays = 28; else maxDays = 29; } if (isBetween(d, 1, maxDays) == false) { return(false); } else { return(true); } } } } /******************************************************************************** * FUNCTION: Compare Date! Which is the latest! * PARAMETERS: lessDate,moreDate AS String * CALLS: isDate,isBetween * RETURNS: TRUE if lessDateDate2) { return(false);} return(true); } /********************************************************************************* * FUNCTION isEmpty checks if the parameter is empty or null * PARAMETER str AS String **********************************************************************************/ function isEmpty (str) { if ((str==null)||(str.length==0)) return true; else return(false); } /********************************************************************************* * FUNCTION: isInt * PARAMETER: theStr AS String * RETURNS: TRUE if the passed parameter is an integer, otherwise FALSE * CALLS: isDigit **********************************************************************************/ function isInt (theStr) { var flag = true; if (isEmpty(theStr)) { flag=false; } else { for (var i=0; i decLen) return(false); else if (!isInt(intPart) || !isInt(decPart)) return (false); else if (isEmpty(decPart)) return (false); else return(true); } } /********************************************************************************* * FUNCTION: isEmail * PARAMETER: String (Email Address) * RETURNS: TRUE if the String is a valid Email address * FALSE if the passed string is not a valid Email Address * EMAIL FORMAT: AnyName@EmailServer e.g; webmaster@hotmail.com * @ sign can appear only once in the email address. *********************************************************************************/ function isEmail (theStr) { var atIndex = theStr.indexOf('@'); var dotIndex = theStr.indexOf('.', atIndex); var flag = true; theSub = theStr.substring(0, dotIndex+1) if ((atIndex <1)||(atIndex != theStr.lastIndexOf('@'))||(dotIndex  Document to open in the new window hite -> Height of the new window wide -> Width of the new window bars -> 1-Scroll bars = YES 0-Scroll Bars = NO resize -> 1-Resizable = YES 0-Resizable = NO * CALLS: NONE * RETURNS: New window instance **********************************************************************************/ function newWindow (doc, hite, wide, bars, resize) { var winNew="_blank"; var opt="toolbar=0,location=0,directories=0,status=0,menubar=0,"; opt+=("scrollbars="+bars+","); opt+=("resizable="+resize+","); opt+=("width="+wide+","); opt+=("height="+hite); winHandle=window.open(doc,winNew,opt); return; } /********************************************************************************* * FUNCTION: DecimalFormat * PARAMETERS: paramValue -> Field value * CALLS: NONE * RETURNS: Formated string **********************************************************************************/ function DecimalFormat (paramValue) { var intPart = parseInt(paramValue); var decPart =parseFloat(paramValue) - intPart; str = ""; if ((decPart == 0) || (decPart == null)) str += (intPart + ".00"); else str += (intPart + decPart); return (str); }