Javascript implements a numeric addition function, while javascript numeric Addition

Javascript implements a numeric addition function, while javascript numeric Addition

If you don't talk nonsense, simply provide the code.

JS

<Script type = "text/javascript"> function Sum (arg1, arg2) {// numeric addition function var sarg1 = new String (arg1 ); // convert the input parameter to a String for parameter check var sarg2 = new String (arg2); // convert parameter 2 to the character type if (sarg1 = "") | (sarg2 = "") // ensure that the parameter is not empty {var e0 = new Error (); // If a parameter is null, an exception e0.Serial = 1000001 is thrown; // error code if (sarg1 = "") // enter the error message {e0.message = "the Sum function parameter is invalid: the first parameter is null! "; // Error description} else {e0.message =" the Sum function parameter is invalid: 2nd parameters are blank! ";} Throw e0; // throw error message} for (I = 0; I <sarg1.length; I ++) {// check the validity of the parameter for (j = 0; j <10; j ++) {// check all characters if (sarg1.charAt (I) = j) // if not a number, an error message {break is thrown; // skip loop} else {if (j = 9) // when the number 9 has been found {var e1 = new Error (); // error message object e1.Serial = 1000001; // error code e1.message = "Sum function parameter:" + sarg1 + "is an invalid number! "; // Error Description: throw e1 ;}}}for (k = 0; k <sarg2.length; k ++) // check that parameter 2 is a number {for (l = 0; l <10; l ++) {// compare if (sarg2.charAt (k) from 0 to 9 one by one) = l) // if it is 0 ~ 9 number {break;} else {if (l = 9) // an Error message {var e2 = new Error () is thrown only when a non-number is contained (); // create the error object e2.Serial = 1000001; // The error code e2.message = "Sum function parameter:" + sarg2 + "is an invalid number! "; Throw e2 ;}}} return Number (arg1) + Number (arg2); // if both parameters are correct, two values and} function buttonequalonclick () are returned () {// standalone event handler for the "compute" button try {var Text1 = document. getElementById ("Text1"); var Text2 = document. getElementById ("Text2"); var Text3 = document. getElementById ("Text3"); var sum = Sum (Text1.value, Text2.value); // call the function to calculate Text3.value = sum; // output the calculation result} catch (e) {// if an error occurs, alert (e. message); // output the information in the exception if (e. serail = 1000001) // if it is error 1000001 {alert (e. message); e = null ;}}</script>

HTML:

<Input type = "text" id = "Text1" style = "width: 84px "maxlength =" 20 "/> + <input type =" text "id =" Text2 "style =" width: 75px "maxlength =" 20 "/>=< input type =" text "id =" Text3 "style =" width: 69px "> <input type =" button "id =" Button1 "value =" Calculate "onclick =" return Button1_onclick () "/>

The above is all the content of this article. I hope you will like it.