Mega Code Archive

 

Categories / JavaScript DHTML / Form Control

 

Validate a number

function processNumber(inputField) {     try {         var inpVal = parseInt(inputField.value, 10);         if (isNaN(inpVal)) {             var msg = "Please enter a number only.";             var err = new Error(msg);             if (!err.message) {                 err.message = msg;             }             throw err;         }     } catch (e) {         alert(e.message);         inputField.focus();         inputField.select();     } }