Check the function parameters : Function « Language Basics « JavaScript DHTML






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Check the function parameters

 <head> <title></title> <script type = "text/javascript" > function addNums(firstNum,secondNum) { if ((isNaN(firstNum)) || (isNaN(secondNum))) { alert("Arguments must be numbers."); return; } elseif (firstNum > secondNum) { alert(firstNum + " is greater than " + secondNum); } else { return firstNum + secondNum; } } </script> </head> <body> <script type = "text/javascript" > document.write(addNums("aaa",3)); document.write("<BR>"); document.write(addNums(2,3)); </script> </body>








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