Form: Invalid Fields

//************************************************** // sIMPLE fORM cHECK v1.0 // written by Chetan M. Soni (11/10/2000) //************************************************** function addToList(theString, errorString) { beginSlice = 0; endSlice = theString.indexOf('_'); theString = theString.slice(beginSlice, endSlice); if (errorString.indexOf(theString) == -1) { errorString = errorString + '

' + theString + '

'; } return errorString; } function isEmailValid(theEmail) { emailLength = theEmail.length; atPos = theEmail.indexOf("@"); dotPos = theEmail.indexOf(".", atPos); if (atPos > 0) { if (dotPos != -1) { if (dotPos > eval(atPos + 1)) { if (dotPos < eval(emailLength - 1)) { return true; } } } } return false; } function showErrors(errorString) { beginString = 'Form: Invalid Fields

The following fields were invalid:
	' endString = '
close window

' if ((window.errorsWindow) && (!window.errorsWindow.closed)) { window.errorsWindow.close(); } errorsWindow = window.open('','errorsWindow','resizable=no,width=300,height=225'); window.errorsWindow.top.document.open() window.errorsWindow.top.document.write(beginString + errorString + endString); window.errorsWindow.top.document.close() } function formChecker(theForm) { errorString = ''; for (numOfField = 0; numOfField < theForm.elements.length; numOfField++) { if ((theForm.elements[numOfField].type == 'text') || (theForm.elements[numOfField].type == 'password')) { if (theForm.elements[numOfField].name.indexOf('_req') != -1) { if (theForm.elements[numOfField].value.length <= 0) { errorString = addToList(theForm.elements[numOfField].name, errorString); } else { if (theForm.elements[numOfField].name.indexOf('_length') != -1) { beginSlice = theForm.elements[numOfField].name.indexOf('_length') + 7; endSlice = theForm.elements[numOfField].name.indexOf('_length') + 9; whatLength = eval(theForm.elements[numOfField].name.slice(beginSlice, endSlice)); if (theForm.elements[numOfField].value.length < whatLength) { errorString = addToList(theForm.elements[numOfField].name, errorString); } } if (theForm.elements[numOfField].name.indexOf('_numeric') != -1) { if (isNaN(theForm.elements[numOfField].value)) { errorString = addToList(theForm.elements[numOfField].name, errorString); } } if (theForm.elements[numOfField].name.indexOf('_email') != -1) { if (!isEmailValid(theForm.elements[numOfField].value)) { errorString = addToList(theForm.elements[numOfField].name, errorString); } } } } } if ((theForm.elements[numOfField].type == 'checkbox') && (theForm.elements[numOfField].name.indexOf('_req') != -1)) { theCheckBoxObj = eval('document.' + theForm.name + '.' + theForm.elements[numOfField].name); if (theCheckBoxObj.length) { // multiple checkboxes (array) beginSlice = theCheckBoxObj[0].name.indexOf('_req') + 4; endSlice = theCheckBoxObj[0].name.indexOf('_req') + 6; howManyReq = eval(theCheckBoxObj[0].name.slice(beginSlice, endSlice)); howManyChecked = 0; for (x = 0; x < theCheckBoxObj.length; x++) { if (theCheckBoxObj[x].checked) { howManyChecked++; } } if (howManyChecked < howManyReq) { errorString = addToList(theForm.elements[numOfField].name, errorString); } numOfField = numOfField + theCheckBoxObj.length - 1; } else { // single checkbox (not array) if (!theForm.elements[numOfField].checked) { errorString = addToList(theForm.elements[numOfField].name, errorString); } } } if ((theForm.elements[numOfField].type == 'select-one') && (theForm.elements[numOfField].name.indexOf('_req') != -1)) { selectedValue = theForm.elements[numOfField].options[theForm.elements[numOfField].selectedIndex].value; if (selectedValue == 0) { errorString = addToList(theForm.elements[numOfField].name, errorString); } } } if (errorString != '') { showErrors(errorString); return false; } else { if ((window.errorsWindow) && (!window.errorsWindow.closed)) { window.errorsWindow.close(); } return true } }