<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <title> PlaceHolder </title> <style type="text/css"> /* 设置提示文字颜色 */ ::-webkit-input-placeholder { color: #838383; } :-moz-placeholder { color: #838383; } .placeholder { color: #ccc; } </style> </head> <body> <input type="text" onkeyup="this.value=this.value.replace(/^ +| +$/g,'')"> 登录用户名、密码文字提示，鼠标离开显示文字 html5 and jquery<br/> <br/> 账号：<input type="text" name="email" placeholder = '用户账号' /><br/> <br/> 密码：<input type="password" name="password" placeholder = '密码' autocomplete="off" /><br/> </body> </html> <script src="http://js.static.m1905.cn/core/jquery-edge.min.js"></script> <script> //判断浏览器是否支持 placeholder属性 function isPlaceholder(){ var input = document.createElement('input'); return 'placeholder' in input; } if(!isPlaceholder()){ //不支持placeholder 用jquery来完成 $("input").not("input[type='password']").each(function(){//把input绑定事件 排除password框 if($(this).val()=="" && $(this).attr("placeholder")!=""){ $(this).val($(this).attr("placeholder")); $(this).focus(function(){ if($(this).val()==$(this).attr("placeholder")) $(this).val(""); }); $(this).blur(function(){ if($(this).val()=="") $(this).val($(this).attr("placeholder")); }); } }); //对password框的特殊处理1.创建一个text框 2获取焦点和失去焦点的时候切换 var pwdField = $("input[type=password]"); var pwdVal = pwdField.attr('placeholder'); pwdField.after('<input id="pwdPlaceholder" type="text" value='+pwdVal+' autocomplete="off" />'); var pwdPlaceholder = $('#pwdPlaceholder'); pwdPlaceholder.show(); pwdField.hide(); pwdPlaceholder.focus(function(){ pwdPlaceholder.hide(); pwdField.show(); pwdField.focus(); }); pwdField.blur(function(){ if(pwdField.val() == '') { pwdPlaceholder.show(); pwdField.hide(); } }); } </script>