defaultValue与value的区别
2015-12-17 10:33
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<html> <head> <script type="text/javascript"> function alertDefaultValue() { alert(document.getElementById('txt1').defaultValue); alert(document.getElementById('txt1').value); // 当你修改了textarea的值就会发现区别 } </script> </head> <body> <textarea id="txt1"> Hello world....This is a text area </textarea> <br /> <input type="button" onclick="alertDefaultValue()" value="Alert default value" /> </body> </html>
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