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;"onfocus="if (value =='点击添入标题'){value =''}"onblur="if (value ==''){value='点击添入标题'}" /><br />textarea:<br /><textarea name="textarea" cols="80" rows="17"onfocus="if(value=='正文：'){value=''}"onblur="if (value ==''){value='正文：'}"></textarea></body></html>?