//... Common JavaScript functions... //... trim(fld) //... isNum(fld) //... isFloat(fld) //... isEmpty(fld) //... validZip(zip) //... validEmail(email) //... validDate(fld) function chkReset(theForm) { //... Check to reset this form... var retval; //... return value... //... Prompt the user wish to reset the form... retval = confirm("Do you REALLY wish to reset this form?"); //... Return to the caller... return retval; } function trim(fld) { //... Remove leading and trailing blanks from a field... var retval; //... return value... var i; //... just a counter... var done; //... indicates non-blank found... //... Copy the field to trim... retval = fld; //... Check for non-empty input... if (retval != null) { //... Remove leading blanks... i = 0; done = false; while (i < retval.length && !done) { if (retval.charAt(i) != " ") { done = true; } else { i++; } } retval = retval.substring(i); //... Remove trailing blanks... i = retval.length - 1; done = false; while (i >= 0 && !done) { if (retval.charAt(i) != " ") { done = true; } else { i--; } } retval = retval.substring(0,i+1); } //... Return to the caller... return retval; } function isNum(fld) { //... Check for a field of numbers... var retval; //... return value... var i; //... just a counter... var done; //... indicates non-number found... //... Assume field contains all numbers... retval = true; //... Check for field of length 0... if (fld.length == 0) { retval = false; } else { //... Scan field for a non-number... for (i=0; i "9") { retval = false; } } } //... Return to the caller... return retval; } function isFloat(fld) { //... Check for a floating point field... var retval; //... return value... var flt_regex = /^(\d*)((\.\d{0,2})?)$/; var result = fld.match(flt_regex); //... Assume field contains a float... retval = true; //... Check for a float... if (result == null) { //... Field is not a float... retval = false; } //... Return to the caller... return retval; } function isEmpty(fld) { //... Check for an empty field... var retval; //... return value... retval = false; if (fld == "" || fld == null) { retval = true; } return retval; } function validZip(zip) { //... Validate a zip code... var retval; //... return value... var zipRegExp = /^(\d{5}){1}((-\d{4})?)$/ retval = zipRegExp.test(zip); return retval; } function validEmail(email) { //... Validate an Email field... var retval; //... return value... var emailRegExp = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/; retval = emailRegExp.test(email); return retval; } //... This script and many more are available free online at //... The JavaScript Source!! http://javascript.internet.com //... Original: Torsten Frey (tf@tfrey.de) //... Web Site: http://www.tfrey.de //... Some mods: ssk. function validDate(fld) { //... Valid a date (mm/dd/yy, mm/dd/yyyy, ...) var retval; //... return value... var checkstr = "0123456789"; var DateField = fld; var DateValue = ""; var DateTemp = ""; var separator = "/"; var day; var month; var year; var leap = 0; var err = 0; var i; retval = false; //... assume date is not valid... err = 0; DateValue = DateField.value; //... Delete all chars except 0-9... for (i = 0; i < DateValue.length; i++) { if (checkstr.indexOf(DateValue.substr(i,1)) >= 0) { DateTemp = DateTemp + DateValue.substr(i,1); } } if (DateValue.length > 0) { DateValue = DateTemp; } //... Always change date to 8 digits - string... //... if year is entered as 2-digit / 0 <= yy <= 50 -> 20yy, else 19yy... if (DateValue.length == 6) { if ((DateValue.substr(4,2) >= 0) && (DateValue.substr(4,2) <= 50)) { DateValue = DateValue.substr(0,4) + "20" + DateValue.substr(4,2); } else { DateValue = DateValue.substr(0,4) + "19" + DateValue.substr(4,2); } } if (DateValue.length != 8) { err = 19; } //... year is wrong if year = 0000... year = DateValue.substr(4,4); if (year == 0) { err = 20; } //... Validation of month... month = DateValue.substr(0,2); if ((month < 1) || (month > 12)) { err = 21; } //... Validation of day... day = DateValue.substr(2,2); if (day < 1) { err = 22; } //... Validation leap-year / february / day... if ((year % 4 == 0) || (year % 100 == 0) || (year % 400 == 0)) { leap = 1; } if ((month == 2) && (leap == 1) && (day > 29)) { err = 23; } if ((month == 2) && (leap != 1) && (day > 28)) { err = 24; } //... Validation of other months... if ((day > 31) && ((month == "01") || (month == "03") || (month == "05") || (month == "07") || (month == "08") || (month == "10") || (month == "12"))) { err = 25; } if ((day > 30) && ((month == "04") || (month == "06") || (month == "09") || (month == "11"))) { err = 26; } //... if no error, write the completed date to Input-Field... if (err == 0) { DateField.value = month + separator + day + separator + year; } //... Set the return value... if (err == 0) { retval = true; } return retval; } var helpWin = null; //... global var to track existence of help window... function newWindow(url,name,h,w) { var nameWin = name; //... name of the help window... var height = h; //... help window height... var width = w; //... help window width... var xTop; //... x upper left position of help window... var yTop; //... y upper left position of help window... /* if (!helpWin) { alert("helpWin is null..."); } else { if (!helpWin.open) { alert("helpWin is not open..."); if (helpWin.screenX) { alert("screenX = "+helpWin.screenX); } } else { if (helpWin.closed) { alert("helpWin has been closed..."); } } } */ //... Center the help window... xTop = screen.width/2 - (width/2); yTop = screen.height/2 - (height/2); //... Close the help window if it is already open... if (helpWin && helpWin.open && !helpWin.closed) { if (helpWin.screenX) { //... Get the old size... xTop = helpWin.screenX; yTop = helpWin.screenY; } if (helpWin.innerHeight) { //... Get the old position... height = helpWin.innerHeight; width = helpWin.innerWidth; } helpWin.close(); helpWin = null; } // alert("1"); if (navigator.appVersion.indexOf('4') != -1) { //... Vars for centering the new window on Version 4 Browsers... // alert("2"); helpWin = window.open(url, nameWin, "height="+height+","+ "width="+width+","+ "scrollbars=yes,"+ "resizable=yes,"+ "menubar=yes,"+ "toolbar=no,"+ "status=no,"+ "left="+xTop+","+ "top="+yTop); } else { // alert("3"); helpWin = window.open(url, nameWin, "height="+height+","+ "width="+width+","+ "scrollbars=yes,"+ "resizable=no,"+ "menubar=yes,"+ "toolbar=no,"+ "status=yes,"+ "screenX="+xTop+","+ "screenY="+yTop); } } function xnewWindow(url, nameW, height, width) { if (navigator.appVersion.indexOf('4') != -1) { //... Vars for centering the new window on Version 4 Browsers... xTop = screen.width/2 - (width/2); yTop = screen.height/2 - (height/2); window.open(url, nameW, 'height='+height+',width='+width+',scrollbars=1,resizable=1,menubar=0,toolbar=0,status=0,location=0,directories=0,left=' + xTop + ',top=' + yTop + ''); } else { window.open(url, nameW, 'height='+height+',width='+width+',scrollbars=1,resizable=1,menubar=0,toolbar=0,status=0,location=0,directories=0,left=75,top=10'); } }