// Javascript String Processing Functions // // Code written by Webscope Services Ltd // (scripting@webscopeservices.com) // // SUMMARY // // These functions are useful to determine what has been entered in text // input boxes. They were designed to be called from a javascript form // validation routine, not directly by using form control events. // // To make use these functions just add the following line into // the section of your web page and copy this file into the same // directory. // // // // // This function is used to check a form field // parameters: f = form name // c = control name // n = descriptive name // t = data type // o = optional flag // max = number of characters / maximum value // opt = optional parameter function validateFormField(f,c,n,t,o,max,opt1,opt2) { var ctl = eval("document."+f+"."+c); if(t=="dropdown"){ var s = ctl[ctl.selectedIndex].value; }else{ var s = ctl.value; } var strCheck = stripSpaces(s); if (strCheck.length==0 && o!=0) { alert("The "+n+" is not optional, please specify."); ctl.focus(); return false; } switch (t) { case "text": if (strCheck.length>max) { alert("The "+n+" you specified is too long (max "+max+" characters), please correct."); ctl.focus(); return false; } if (arguments.length > 6){ if (strCheck.length 7){ if (opt2=="login"){ var res = validateForLogin(s,opt1,max,0); switch (res) { case 2: alert("The "+n+" you specified contains invalid characters. You can only use a-z and 0-9, please correct."); ctl.focus(); return false; break; default: // continue } } if (opt2=="securePassword"){ var res = validateForLogin(s,opt1,max,1); switch (res) { case 2: alert("The "+n+" you specified contains invalid characters. You can only use a-z and 0-9, please correct."); ctl.focus(); return false; break; case 3: alert("The "+n+" you specified is not in the correct format. It must contain at least 2 characters and 2 numbers, please correct."); ctl.focus(); return false; break; default: // continue } } } break; case "integer": if (strCheck.length>0) { if (validateForIntegers(s)==false) { alert("The "+n+" you specified has not been recognised as a valid whole number, please correct."); ctl.focus(); return false; } if (s.length>13) { alert("The "+n+" you specified is too large, please correct."); ctl.focus(); return false; } if (arguments.length > 6) { if (smax) { alert("The "+n+" you specified is too large (maximum is "+max+"), please correct."); ctl.focus(); return false; } } break; case "decimal": if (strCheck.length>0) { if (validateForDecimals(s)==false) { alert("The "+n+" you specified has not been recognised as a valid number, please correct."); ctl.focus(); return false; } if (s.length>12) { alert("The "+n+" you specified is too large, please correct."); ctl.focus(); return false; } // max = the maximum value // opt1 = number of decimal places if (s>max) { alert("The "+n+" you specified is too large, please correct."); ctl.focus(); return false; } // find the position of the decimal point var pos1=s.indexOf("."); if (pos1>-1) { // decimal point is found if ((s.length-pos1)>(opt1+1)) { alert("The "+n+" you specified has too many decimal places (maximum "+opt1+"dp), please correct."); ctl.focus(); return false; } } } break; case "email": if (strCheck.length>0) { if (validateForEmail(s)==false) { alert("The email you entered has not been recognised as a valid email, please correct before trying to update."); ctl.focus(); return false; } } break; case "date": if (strCheck.length>0) { var strDate = verifyDate(s); ctl.value = strDate; if (strDate == "") { ctl.focus(); return false; } // ensure the date is not a future date if (max<0) { if (daysSinceNow(strDate)>0) { alert(n+" cannot be a future date, please correct."); ctl.value=""; ctl.focus(); return false; } } // ensure the date is not a historic date if (max>0) { if (daysSinceNow(strDate)<0) { alert(n+" cannot be a historic date, please correct."); ctl.value=""; ctl.focus(); return false; } } } break; case "dropdown": // Check to see if 'max' has been specified // If specified it is the value of the OPTION that represents no selection if (arguments.length > 5){ if (strCheck=max) { alert("The "+n+" is not optional, please specify."); ctl.focus(); return false; } } break; default: alert("The data type was not recognised for this form field."); return false; } return true; } // // This function strips out any spaces from the passed string and returns the result // Useful to ensure a valid string has been passed and not just spaces // function stripSpaces(astr) { var i=0; var c; var rstr=""; for (i=0;imaxLen) { isOk=1; }else{ for (i=0;i-1) { pos1=pos1+1; pos2=astr.indexOf(".",pos1); if (pos2>-1) { isOk = false; return isOk; } } for (i=0;i // // The checkDate function calls the 'verifyDate' function that does all the // analysis. This function uses the 'split' method of the string object which // is why the routines are Javascript 1.2. // // To use these functions just add the following line into // the section of your web page and copy this file into the same // directory. // // // var leapdays = new Array(31,29,31,30,31,30,31,31,30,31,30,31); var yeardays = new Array(31,28,31,30,31,30,31,31,30,31,30,31); var todaysDate = new Date(); function isLeapYear( year ){ // is it leap year ? returns a boolean return ( (0 == (year%4)) && ( (0 != (year%100)) || (0 == (year%400)))); // ie, if the year divides by 4, but not by 100 except when it divides by // 400, it is leap year } function isValidDayOfMonth( day, month, year) { // determines whether a day is valid // (ie, prevents Feb 30 from being processed) // ( not used but left here for other pages that use // this calendar, like the time-off request form ) // if (day <= 0) { return false; } if (isLeapYear(year)) { return (day <= leapdays[month])} return ( day <= yeardays[month]); } function canonicalDate(day, month, year) { // return the number of days since the Jan 0 2000 (ie, 1/1/2K returns 1, 31/12/1999 returns 0) // for days before Jan 1 2000, returns negative numbers var canonDate = 0; // if the function had no arguments, use today's date; var mday = todaysDate.getDate(); var mmon = todaysDate.getMonth(); var myr = todaysDate.getFullYear(); if( arguments.length > 0 ) { mday = arguments[0]; } if( arguments.length > 1 ) { mmon = arguments[1]; } if( arguments.length > 2 ) { myr = arguments[2]; } if(myr >= 2000) { canonDate += mday; while(mmon > 0) { canonDate += isLeapYear(myr) ? leapdays[mmon]: yeardays[mmon]; mmon--;} while(myr > 2000){ canonDate += isLeapYear(myr) ? 366: 365; myr--; } } else { canonDate -= isLeapYear(myr) ? leapdays[mmon] - mday: yeardays[mmon] - mday; while(mmon < 11) { mmon++; canonDate -= isLeapYear(myr) ? leapdays[mmon]: yeardays[mmon];} while(myr < 1999){ myr++; canonDate -= isLeapYear(myr) ? 366: 365;} } return canonDate; } function dateDiff(firstDate, secondDate) { // returns the result in days of subtracting firstDate from secondDate. Result is // negative if secondDate came before firstDate. var days= ( canonicalDate(secondDate.getDate(), secondDate.getMonth(), secondDate.getFullYear()) - canonicalDate(firstDate.getDate(), firstDate.getMonth(), firstDate.getFullYear())); return days; } function daysBetween(yr, mo, dy) { var SECOND = 1000; // the number of milliseconds in a second var MINUTE = SECOND * 60; // the number of milliseconds in a minute var HOUR = MINUTE * 60; // the number of milliseconds in an hour var DAY = HOUR * 24; // the number of milliseconds in a day var WEEK = DAY * 7; // the number of milliseconds in a week var nDate = new Date(); // current date (local) var nTime = nDate.getTime(); // current time (UTC) var dTime = Date.UTC(yr, mo, dy); // specified time (UTC) var nowDays = (nTime/DAY); var specifiedDays = (dTime/DAY); if (Math.round(nowDays)>nowDays){ nowDays = Math.round(nowDays)-1; }else{ nowDays = Math.round(nowDays); } if (Math.round(specifiedDays)>specifiedDays){ specifiedDays = Math.round(specifiedDays)-1; }else{ specifiedDays = Math.round(specifiedDays); } return (specifiedDays-nowDays); //Math.round(bTime / DAY); } function daysSinceNow(s) { // Breakdown the seperate parts of the date var strMu = new String("Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec"); var arrMonths = strMu.split(","); var arrDate = s.split(" "); var part1 = arrDate[0]; var part2 = arrDate[1]; var part3 = arrDate[2]; var m = 0; for (i=0;i<=11;i++){ if (arrMonths[i]==part2){ m = i; } } var d = daysBetween(part3,m,part1); return d; } function convertStringIntoDate(s) { // Breakdown the seperate parts of the date var strMu = new String("Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec"); var arrMonths = strMu.split(","); var arrDate = s.split(" "); var part1 = arrDate[0]; var part2 = arrDate[1]; var part3 = arrDate[2]; var m = 0; for (i=0;i<=11;i++){ if (arrMonths[i]==part2){ m = i; } } var d = new Date(part3,m,part1); return d; } function checkDate(ctrl) { //ctrl is a reference to the input box object holding the date var str = ctrl.value; str = stripLeadingSpaces(str); if (str.length>0) { var strDate = verifyDate(str); if (strDate == "") { ctrl.value = ""; ctrl.focus(); } else { ctrl.value = strDate; } } } function verifyDate(strDate) { var i = 0; var mnth = 0; var pos1 = 0; var pos2 = 0; var strTemp = ""; var numChars = strDate.length; // Check for the delimiting character var strD = getDelimiter(strDate); if (strD=="") { alert("The entry has not been recognised as a valid date."); return ""; } // Breakdown the seperate parts of the date var arrDate = strDate.split(strD); var part1 = arrDate[0]+''; var part2 = arrDate[1]+''; var part3 = stripSpaces(arrDate[2]+''); // part1 = day // Check that the value is purely numbers if (validateForIntegers(part1)==false) { alert("The entry ahs not been recognised as a valid date, please try again."); return ""; } intPart1 = parseInt(part1); // Define array of months var strMu = new String("blank,Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec"); var strMl = new String("blank,jan,feb,mar,apr,may,jun,jul,aug,sep,oct,nov,dec"); var arrMu = strMu.split(","); var arrMl = strMl.split(","); // part2 = month // Check that if the value is purely numbers if (validateForIntegers(part2)==true) { // Check that it is between 1 and 12 var intPart2 = parseInt(part2,10); if (intPart2<1 || intPart2>12) { alert("The date entered does not have a valid month, please try again."); return ""; } mnth=intPart2; } else { // Check that if the value is text then it matches either the short or long version of the month var strPart2 = part2.substring(0,3); for (i=1; i<=12; i++) { if (strPart2==arrMu[i]) { mnth = i; } if (strPart2==arrMl[i]) { mnth = i; } } if (mnth==0) { alert("The date entered does not have a valid month, please try again."); return ""; } } part2 = arrMu[mnth]; // part3 = year // Check that the value is purely numbers if (part3.length==0) { alert("No year has been recognised for this date. Please include the year when entering a date."); return ""; } if (validateForIntegers(part3)==false) { alert("The year has not been recognised as a number, please try again."); return ""; } // If there are only 2 numbers then derive the 4 number year if (part3.length<3) { var intPart3 = parseInt(part3,10); if (intPart3>70) { part3 = "19" + part3 } else { if (part3.length==1) { part3 = "200" + part3 }else{ part3 = "20" + part3 } } }else{ if (part3.length>4){ part3 = part3.substring(0,4) } } intPart3 = parseInt(part3); // Check that the date IS a valid date if (isValidDayOfMonth(intPart1,(mnth-1),intPart3)==false){ alert("The date you entered has not been recognised as a valid date, please try again."); return ""; } strDate = part1 + " " + part2 + " " + part3; return strDate; } // // This function derives which of the acceptable delimiters have been used // function getDelimiter(str) { var strD = ""; var pos1 = 0; var pos2 = 0; pos1 = str.indexOf(" "); if (pos1>=0) strD = " "; if (strD=="") { pos1 = str.indexOf("-"); if (pos1>=0) strD = "-"; } if (strD=="") { pos1 = str.indexOf("/"); if (pos1>=0) strD = "/"; } if (strD=="") { pos1 = str.indexOf("\\"); if (pos1>=0) strD = "\\"; } // Check for a second occurance of the delimiter if (strD!="") { pos2 = str.indexOf(strD,pos1); if (pos2==0) strD = ""; } return strD; } // These functions are to trap key press actions to stop invalid entries into a field // Example use : onkeydown="blockEntry();" function blockEntry(){ event.returnValue=false; } function allowNumbers(c,size) { var myCode = event.keyCode; var allowed = false; var myStr = ""; if( arguments.length > 0){ myStr = c.value+""; } if (myCode==8) allowed=true; // Backspace if (myCode==9) allowed=true; // Tab if (myCode>=48 && myCode<=57) allowed=true; // Numbers if (allowed) { // if a number has been entered then check to see if number of characters entered is ok if( arguments.length > 1){ // check to see if the number of characters entered already is equal to 'size' if (myStr.length>=size){ event.returnValue=false; return; } } } if (!allowed) event.returnValue=false; } function allowDecimal(c,size,dp) { var myCode = event.keyCode; var allowed = false; var myStr = c.value+""; var i=0; var hasDecimal=0; if (myStr.length>0) { for (i=0;i=48 && myCode<=57) allowed=true; // Numbers if (allowed) { // if a number has been entered then check to see if number of characters entered is ok if( arguments.length > 1){ // check to see if the number of characters entered already is equal to 'size' if (hasDecimal==0 && myStr.length>=size){ event.returnValue=false; return; } } } if (myCode==46 && hasDecimal==0) allowed=true; // Period if( arguments.length > 2 && allowed){ // check to see if the number of decimal places have already been used if (hasDecimal>0 && (myStr.length-hasDecimal)>=dp){ event.returnValue=false; return; } } if (!allowed) event.returnValue=false; } function allowEmailChars(c) { var myCode = event.keyCode; var allowed = false; var myStr = c.value+""; var i=0; var hasAt=0; if (myStr.length>0) { for (i=0;i=48 && myCode<=57) allowed=true; // Numbers if (myCode>=65 && myCode<=90) allowed=true; // Capital Letters if (myCode>=97 && myCode<=122) allowed=true;// Letters if (!allowed) event.returnValue=false; } function allowAlphaNumericOnly() { var myCode = event.keyCode; var allowed = false; if (myCode==8) allowed=true; // Backspace if (myCode==9) allowed=true; // Tab if (myCode>=48 && myCode<=57) allowed=true; // Numbers if (myCode>=65 && myCode<=90) allowed=true; // Capital Letters if (myCode>=97 && myCode<=122) allowed=true;// Letters if (!allowed) event.returnValue=false; } function allowAlphaNumeric() { var myCode = event.keyCode; var allowed = false; if (myCode==8) allowed=true; // Backspace if (myCode==9) allowed=true; // Tab if (myCode==32) allowed=true; // Space if (myCode>=48 && myCode<=57) allowed=true; // Numbers if (myCode>=65 && myCode<=90) allowed=true; // Capital Letters if (myCode>=97 && myCode<=122) allowed=true;// Letters if (!allowed) event.returnValue=false; } function allowAlphaNumericPlus() { var myCode = event.keyCode; var allowed = false; if (myCode==8) allowed=true; // Backspace if (myCode==9) allowed=true; // Tab if (myCode==32) allowed=true; // Space if (myCode>=48 && myCode<=57) allowed=true; // Numbers if (myCode>=65 && myCode<=90) allowed=true; // Capital Letters if (myCode>=97 && myCode<=122) allowed=true;// Letters if (!allowed) event.returnValue=false; } function allowText(c,l) { var myCode = event.keyCode; var allowed = false; if (myCode==8) allowed=true; // Backspace if (myCode==9) allowed=true; // Tab if (myCode==13) allowed=true; // Return if (myCode==32) allowed=true; // Space if (myCode==33) allowed=true; // ! if (myCode==34) allowed=true; // " if (myCode==36) allowed=true; // $ if (myCode==37) allowed=true; // % if (myCode==38) allowed=true; // & if (myCode==39) allowed=true; // ' if (myCode==40) allowed=true; // ( if (myCode==41) allowed=true; // ( if (myCode==42) allowed=true; // * if (myCode==43) allowed=true; // + if (myCode==44) allowed=true; // , if (myCode==45) allowed=true; // - if (myCode==46) allowed=true; // . if (myCode==47) allowed=true; // / if (myCode==60) allowed=true; // less than if (myCode==62) allowed=true; // greater than if (myCode==63) allowed=true; // ? if (myCode==95) allowed=true; // _ if (myCode==163) allowed=true; // � if (myCode>=48 && myCode<=57) allowed=true; // Numbers if (myCode>=65 && myCode<=90) allowed=true; // Capital Letters if (myCode>=97 && myCode<=122) allowed=true;// Letters if( arguments.length > 1){ // check if the amount enterd is the maximum if(c.value.length>=l) allowed=false } if (!allowed) event.returnValue=false; } function showKeyCode(t) { var myCode = event.keyCode; t.value = myCode; } function createBarCode(ctl) { var companyBarCodeID = "5025123"; var myStr = ctl.value; var s = ""; var myCode = event.keyCode; var allowed = false; if (myCode==8) allowed=true; // Backspace if (myCode>=48 && myCode<=57) allowed=true; // Numbers if (!allowed) { event.returnValue=false; }else{ switch (myStr.length) { case 0: // There is nothing entered so add the company bar code to the beginning if (myCode!=8) ctl.value = companyBarCodeID; break; case 7: // Check to see if the code has been entered and deleted if (myStr==companyBarCodeID) ctl.value=""; break; default: // Check that the initial 7 characters match the company bar code ID s = myStr.substring(0,7); if (s!=companyBarCodeID) { myStr = companyBarCodeID+myStr; myStr = myStr.substring(0,12); ctl.value = myStr; } } } }