Common JS library functions

Source http://www.dotblogs.com.tw/newmonkey48/archive/2009/11/22/12104.aspx
JS Code website http://www.cftea.com/c/2006/08/1F94458YM61AMFVD.asp
// JScript file // ******************** Add the composer JavaScript function ***** // string. prototype. trim = function () {return this. replace (/(^ \ s *) | (\ s * $)/g, "");} string. prototype. ltrim = function () {return this. replace (/(^ \ s *)/g, "");} string. prototype. rtrim = function () {return this. replace (/(\ s * $)/g ,"");} // ******************* certificate ****************** * //// function checklen (controlid, length, fielddesc, blnreque St) {var control = getcontrol (controlid); VaR value = getcontrolvalue (controlid); var stralert = ""; if (blnrequest = true) {stralert = checkcontrol ("request", controlid, fielddesc); If (stralert! = "") Return stralert;} else if (value = "") Return ""; if (blen (value)> length) {return fielddesc + "the number of characters in a field cannot exceed" + (length/2) + "the number of words or English characters cannot exceed" + Length +! \ R \ n ";} return" ";}// returns the length function blen (STR) {// exam site // http://www.360doc.com/content/081222/15/16915_2177384.html var Len = Str. match (/[^-~] /G) = NULL? Str. Length: Str. Length + Str. Match (/[^-~] /G ). length; return Len;} // determines whether the start time of the period is greater than the end time function checkdaterange (begdateid, enddateid, fielddesc, blnrequest) {var objbegdate; var objenddate; vaR valuebegdate, valueenddate; objbegdate = getcontrol (begdateid); objenddate = getcontrol (enddateid); valuebegdate = getcontrolvalue (begdateid); valueenddate = getcontrolvalue (enddateid); region = date. parse (objbegdate. value); dtenddate = date. parse (objenddat E. Value); If (blnrequest = true) {stralert = checkcontrol ("request", begdateid, fielddesc + "start date"); If (stralert! = "") Return stralert; stralert = checkcontrol ("request", enddateid, fielddesc + "end date"); If (stralert! = "") Return stralert;} else if (valuebegdate = "" | valueenddate) Return ""; if (dtbegdate> dtenddate) {return "date large, it cannot be placed in front! \ R \ n ";}return" ;}// determines whether the period is in the date format of function checkdate (controlid, fielddesc, blnrequest) {var control = getcontrol (controlid ); vaR value = getcontrolvalue (controlid); If (blnrequest = true) {stralert = checkcontrol ("request", controlid, fielddesc); If (stralert! = "") Return stralert;} else if (value = "") Return ""; // rules: yyyy/mm/DD var OBJ, strvalue, flag = false; strvalue = getcontrolvalue (controlid); If (strvalue = "") Return ""; vaR objregexp =/^ \ D {4} \/\ D {1, 2} \/\ D {1, 2} $/; // check to see if in correct format if (! Objregexp. Test (strvalue) {return fielddesc + "the digit must be in the date format of the western dollar! (Yyyy/mm/DD) \ r \ n "; // doesn't match pattern, bad date} else {var strseparator = '/'; var arraydate = strvalue. split (strseparator); // create a lookup for months not equal to Feb. vaR arraylookup = {'01 ': 31, '03': 31, '04': 30, '05 ': 31, '06': 30, '07': 31, '08 ': 31, '09': 30, '10': 31, '11': 30, '12': 31} var intday = parseint (arraydate [2], 10); // check if month value and day value agree if (Ar Raylookup [arraydate [1]! = NULL) {If (intday <= arraylookup [arraydate [1] & intday! = 0) Flag = true; // found in lookup table, good date} // check for February (bugfix 20050322) // bugfix for parseint Kevin/bugfix Biss year o. JP voutat var intmonth = parseint (arraydate [1], 10); If (intmonth = 2) {var intyear = parseint (arraydate [0]); if (intday> 0 & intday <29) {flag = true;} else if (intday = 29) {If (intyear % 4 = 0) & (intyear % 100! = 0) | (intyear % 400 = 0) {// year Div by 4 and (not Div by 100) or Div by 400) -> OK flag = true ;}}}if (flag = false) {return fielddesc + "the specified date information has been updated! \ R \ n ";}return" ;}// determine whether the value is in the digital format of function checknumber (controlid, fielddesc, blnrequest) {var control = getcontrol (controlid ); vaR value = getcontrolvalue (controlid); If (blnrequest = true) {stralert = checkcontrol ("request", controlid, fielddesc); If (stralert! = "") Return stralert;} else if (value = "") Return ""; if (isnumber (value) = false) {return fielddesc + "the digit must be a number! \ R \ n ";}return" ";}// determines whether the entire function checkinteger (controlid, fielddesc, blnrequest) {var control = getcontrol (controlid ); vaR value = getcontrolvalue (controlid); If (blnrequest = true) {stralert = checkcontrol ("request", controlid, fielddesc); If (stralert! = "") Return stralert;} else if (value = "") Return ""; if (isinteger (value) = false) {return fielddesc + "the bitwise must be an integer! \ R \ n ";}return" ";}// determines whether the receiver is in the email format of function checkemail (controlid, fielddesc, blnrequest) {var control = getcontrol (controlid ); vaR value = getcontrolvalue (controlid); If (blnrequest = true) {stralert = checkcontrol ("request", controlid, fielddesc); If (stralert! = "") Return stralert;} else if (value = "") Return ""; if (isemail (value) = false) {return fielddesc + "the signature must be email! \ R \ n ";}return" ";}// determine whether the role is in the function checkidnumber (controlid, fielddesc, blnrequest) format) {var control = getcontrol (controlid); VaR value = getcontrolvalue (controlid); If (blnrequest = true) {stralert = checkcontrol ("request", controlid, fielddesc ); if (stralert! = "") Return stralert;} else if (value = "") Return ""; if (isidnumber (value) = false) {return fielddesc + "signature must be in the authentication token format! \ R \ n ";} return" ";}// confirm whether the input information function checkrequest (controlid, fielddesc) {var control = getcontrol (controlid ); vaR value = getcontrolvalue (controlid); var tagname = control. tagname. tolowercase (); If (tagname = "select") {If (control. options [control. selectedindex]. value = "") {return "Please select" + fielddesc + "\ r \ n";} else return "";} else if (tagname = "input ") {var type = control. typeswitch (type) {Case "text": If (isempty (Value) {return "" + fielddesc + "\ r \ n";} break; Case "checkbox": break; Case "radio": break ;}} return "";} // ********************************* shared method ***** **************************** // obtain the control function getcontrolvalue (controlid) {var control; VaR value; control = getcontrol (controlid); value = control. value; Return Value} // obtain the value of the control counter function getcontrol (controlid) {return document. getelementbyid (controlid);} // simplified version Required parameter functionfunction checkcontrol (type, controlid, fielddesc, blnrequest) {Switch (type) {Case "date": Return checkdate (controlid, fielddesc, blnrequest); break; case "Number": Return checknumber (controlid, fielddesc, blnrequest); break; Case "integer": Return checkinteger (controlid, fielddesc, blnrequest); break; Case "email ": return checkemail (controlid, fielddesc, blnrequest); break; Case "idnumber": Return checkidnumbe R (controlid, fielddesc, blnrequest); break; Case "request": Return checkrequest (controlid, fielddesc, blnrequest); break ;}} // set function controlfocus (controlid) {var control = getcontrol (controlid); control. focus ();} // ******************************** basic judgment function *** *********************** // determine whether the value is a function isnumber (value) {If (isnan (value) return false; return true;} // judge whether the value is an integer function isinteger (value) {v Ar objregexp =/^ -? \ D + $/; If (! Objregexp. test (value) return false; return true;} // you must have a function isempty (value) {If (value. trim () = "") return true; else return false;} // determines whether the callback is e-mailfunction isemail (value) {var objregexp =/^. + @. + \.. + $/; If (! Objregexp. test (value) return false; return true;} // determines whether the token is an ID function isidnumber (value) {// sorted by the letter delimiter, used to store the values column. VaR letters = new array ('A', 'B', 'C', 'D', 'E', 'F', 'G', 'h ', 'J', 'k', 'l', 'M', 'n', 'P', 'Q', 'R', 's','t ', 'U', 'V', 'x', 'y', 'w', 'z', 'I', 'O '); // store the multiplication numbers var multiply = new array (1, 9, 8, 7, 6, 5, 4, 3, 2, 1 ); vaR Nums = new array (2); var firstchar; var firstnum; var lastnum; var Total = 0; // create a regular expression 」. The first word is an English letter, // The second word is 1 or 2, followed by 8 numbers, regardless of size. VaR regexpid =/^ [A-Z] (1 | 2) \ D {8} $/I; // use the regular expression of the Regular Expression if (value. search (regexpid) =-1) {// basic format: Invalid Response Return false;} else {// retrieve the first element and the last digit. Firstchar = value. charat (0 ). touppercase (); lastnum = value. charat (9) ;}// locate the corresponding number of the first letter and convert it to two numbers. For (VAR I = 0; I <26; I ++) {If (firstchar = letters [I]) {firstnum = I + 10; Nums [0] = math. floor (firstnum/10); Nums [1] = firstnum-(Nums [0] * 10); break ;}} // compute the sum of rows for (VAR I = 0; I <multiply. length; I ++) {if (I <2) {total + = Nums [I] * multiply [I];} else {total + = parseint (value. charat (I-1) * multiply [I];} // compare to the last numeric value if (10-(Total % 10 ))! = Lastnum) {return false;} return true ;}