JavaScript Number.NEGATIVE_INFINITY JavaScript Number.toExponential() 方法 javascript 创建对象 JavaScript Number.NEGATIVE_INFINITY <html> <head> <script> <!-- function showValue() { var smallNumber = (-Number.MAX_VALUE) * 2 if (smallNumber == Number.NEGATIVE_INFINITY) { alert("Value of smallNumber : " + smallNumber ); } } //--> </script> </head> <body> <p>Click the following to see the result:</p> <form> <input type="button" value="Click Me" onclick="showValue();" /> </form> </body> </html> JavaScript Number.toExponential() 方法 javascript 创建对象