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- Various judgment JS if the input data is legal
No title document </ title> <script language = "javascript"> Remove space Function Trim (Str) {if (str.charat (0) == "") {str.slice (1); str = trim (str);} Return Str;} Judgment is empty Function ISempty (Pobj, Errmsg ) {Var obj = evAl (pobj); if (Obj == null || trim (obj.value) == "") {if (errmsg == null || errmsg == ") ALERT (" input is empty ! "); Else Alert (errmsg); obj.focus (); returnif;} Return true;} Decision is a digital function isnumber (Pobj, errmsg) {var obj = evAl (pobj); strref =" 1234567890 "; IF (! iSempty (Pobj, Errmsg) Return False; for (i = 0; i <obj.value.length; i ) {tempchar = obj.value.substring (i, i 1); if (strref.indexof) (TempChar, 0) == - 1) {if (errmsg == NULL || errmsg == ")) Alert (" Data does not meet the requirements, please check "); else alert (errmsg); if (obj.type = = "text") obj.focus (); return false;}} return true;</p>
<p>/ / Judgment is a number, the number can be negative function isnegative (Pobj, errmsg) {var obj = evAl (pobj); strref = "1234567890-"; if (! ISempty (Pobj, errmsg)) Return False; for (i = 0; i <obj.value.Length; i ) {tempchar = obj.value.substring (i, i 1); if (strref.indexof (Tempchar, 0) == - 1) {if (errmsg == Null || errmsg == "") ALERT ("Data does not meet the requirements, please check"); else alert (errmsg); if (obj.type == "text") obj.focus (); return false;} Else {IF (i> 0) {if (obj.valubstring (i, i 1) == "-") {if (errmsg == null || errmsg == ") Alert (" data does not meet the requirements , Please check "); Else Alert (errmsg); if (obj.type ==" text ") obj.focus (); returnaf true;}}}} Return True;} Judgment is the form of money Function ismoney {var obj = evAl (pobj); strref = "1234567890."; if (! iSempty (Pobj, errmsg) Return False; for (i = 0; i <obj.value.length; i ) {Tempchar = obj.value.substring (i, i 1); if (strref.indexof (TempChar, 0) == - 1) {if (errmsg == null || errmsg == ") Alert (" data does not match Require, please check "); else alert (errmsg); if (obj.type ==" text ") OBJ .focus (); return false;} else {templen = obj.value.indexof ("."); if (templen! = - 1) {strlen = obj.valubstring (Templen 1, Obj.value.LENGTH ); If (Strlen.Length> 2) {if (errmsg == null || errmsg == ") Alert (" Data does not meet the requirements, please check "); else alert (errmsg); if (obj.type = = "text") obj.focus (); return false;}}}}}}}}}}} Return True;</p>
<p>Function isleApyear (Year) {IF ((Year% 4 == 0 && Year% 100! = 0) || (Year% 400 == 0)) {return true;}} // The judgment time is correct</p>
<p>Function isdate (CheckText) {var datetime; var year, month, day; var gone, gtwo; if (Trim (checktext.value)! = "") {datetime = trim (checktext.value); if (DateTime.length = = 10) {year = datetime.substring (0,4); if (isnan == true) {alert ("Please enter the date! Format is (YYYY-MM-DD) / N example (2001-01- 01)! "); CheckText.focus (); return false;} gone = datetime.substring (4, 5); Month = DateTime.Substring (5,7); if (isnan == true) {Alert ("Please enter the date! YYYY-MM-DD) / N example (2001-01-01)!"); Checktext.focus (); return false;} gtwo = datetime.substring (7,8); Day = datetime.substring (8, 10); if (isnan (day) == true) {alert ("Please enter the date! Format is (YYYY-MM-DD) / N example (2001-01-01)!" CheckText.focus (); return false;} IF ((gtwo == "-") && (gtwo == ")) {if (Month <1 || Month> 12) {Alert (" Month must Between 01 and 12! "); Checktext.focus (); return false;} if (DAY <1 || day> 31) {alert (" Date must be between 01 and 31! "); CheckText.foCus ();} Else {if (Month == 2) {if (isleapyear && day> 29) {Alert ("February Date must be between 01 to 29!"); CheckText.foC US (); return false;} if (! isleapyear (year) && day> 28) {Alert ("February Date must be between 01 to 28!"); checktext.focus (); return false;}}} (MONTH == 4 || Month == 6 || Month == 9 || Month == 11) && (Day> 30)) {Alert ("in four, six, nine, Nirtiend / N" must 01 to 30 Between ""); checktext.focus (); return false;}} else}}} else {Alert ("Please enter the date! YYYY-MM-DD) / N (2001-01-01)" CheckText.focus (); return false;}} else {alert ("</p>
<p>Please enter the date! Format is (YYYY-MM-DD) / N (2001-01-01) "); checktext.focus (); return false;}} else {return true;} Return true;} </ script > <script language = "javascript"> function checked (theform) {if (! iSempty (theform.aa, 'Please enter data')) Return False;} </ script> </ head> <body> <form method = "post" action = "" name = "dd" onSubmit = "return checked (this);"> determines whether the input data <input type = "text" name = "aa"> <br> number determination <input type = " Text "name =" bb "onchange =" Return ISNumber (this, ''); "> <br></p>
<p>The number of judgments, can be negative <input type = "text" name = "DD" onchange = "Return IsNegative (this, '');"> <br> Judgment amount <input type = "text" name = "cc" onchange = "Return ismoney (this, '');"> <br></p>
<p>Judgment time <input type = "text" name = "ee" onchange = "return isdate (this)"> <br> <input type = "submit" value = "submit"> </ form> </ body> </ HTML></p></div><div class="text-center mt-3 text-grey">
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