正则表达式验证（Regular expression verification）.docVIP

正则表达式验证（Regular expression verification） * Purpose: check whether the incoming Email mailbox format is correct Input: StrEmail: String Return： If true is returned by validation, false is returned * / Function checkEmail (strEmail) { //var emailReg = /^[_a-z0-9]+@ ([_a-z0-9]+\.) +[a-z0-9]{2,3}$/; Var emailReg = /^[\w-]+ (\.[\w-]+) *@[\w-]+ (\.[\w-]+) +$/; If (emailReg.test (strEmail)) { Return true; }else{ Alert (the Email address you entered is not in the correct format! ); Return false; } } * Purpose: check the format of the IP address Input: strIP:ip address Returns: if true is returned by validation, false is returned; * / Function isIP (strIP) { If (isNull (strIP)) return false; Var re=/^ (\d+). (\d+). (\d+). (\d+) $/g, the regular expression / / IP address If (re.test (strIP)) { If (RegExp.$1 256 RegExp.$2256 RegExp.$3256 RegExp.$4256) return true; } Return false; } * Purpose: check whether the incoming cell phone number is correct Input: S: String Return： If true is returned by validation, false is returned * / Function checkMobile (s) { Var regu =/^[1][3][0-9]{9}$/; Var re = new RegExp (regu); If (re.test (s)) { Return true; }else{ Return false; } } * Purpose: check that the incoming phone number is in the correct format Input: StrPhone: String Return： If true is returned by validation, false is returned * / Function checkPhone (strPhone) { Var phoneRegWithArea = /^[0][1-9]{2,3}-[0-9]{5,10}$/; Var phoneRegNoArea = /^[1-9]{1}[0-9]{5,8}$/; Var prompt = the number you entered is incorrect! If (strPhone.length 9) { If (phoneRegWithArea.test (strPhone)) { Return true; }else{ Alert (prompt); Return false; } }else{ If (phoneRegNoArea.test (strPhone)) { Return true; }else{ Alert (prompt); Return false; } } } * Use: check whether the input string is empty or all spaces Input: STR Return： If all is empty, return true, otherwise return false * / Function isNull (STR) { If (STR = = return true); Var regu = ^[]+$; Var re = new RegExp (regu); Return re.test (STR); }