点击input默认值消失
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><title>index.html</title></head><body><input type="text" id="test" value="xxx@xxx.com" style="color: gray;"onkeypress="this.style.color='black';" /><hr />点击input默认值消失<br />input:<br /><input name="textfield" type="text" value="点击添入标题" style="color: gray;" /><br />textarea:<br /><textarea name="textarea" cols="80" rows="17"></textarea></body></html>
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