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关于onfocus.onblur的使用_html/css_WEB-ITnose

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Release： 2016-06-21 09:42:48
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<input type="text" name="username" size="20" class="login_input"           value="用户名/邮箱"            onfocus="if(value=='用户名/邮箱'){value='';}"           onblur="if(value==''){value='用户名/邮箱'';}"                          />
Copy after login

功能：为了实现用户登入前文本框里的提示信息！
运行时，鼠标放进文本框里时文字会消失，但是鼠标已移开后，文本框里却没有任何显示！为什么呢？


回复讨论(解决方案)

  onblur="if(value==''){value='用户名/邮箱 '';}"　
'多打了一个，用firebug调试吧，这种错误好发现的。

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关于onfocus.onblur的使用
source：php.cn
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