value="你的提示文字" onFocus="if(value==defaultValue){value='';this.style.color='#000'}" onBlur="if(!value){value=defaultValue;this.style.color='#999'}" style="color:#999999"
转自 http://blog.sina.com.cn/s/blog_5ee2c4040100pxzg.html
value="你的提示文字" onFocus="if(value==defaultValue){value='';this.style.color='#000'}" onBlur="if(!value){value=defaultValue;this.style.color='#999'}" style="color:#999999"
转自 http://blog.sina.com.cn/s/blog_5ee2c4040100pxzg.html