html:text怎么用实现Placeholder属性 html:text没有Placeholder属性,怎么用jQuery 实现 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 <style> span.placeholder {color:#999;position:absolute;padding:3px;} </style><input tabindex="1" type="text" id="username" name="username" class="input required" style='background-color:#FFF; border:1px #b5b8c8 solid;width: 180px; height: 20px; color:#666; line-height: 21px; text-indent: 5px;' placeholder="请输入邮箱" /><script> function initPlaceHolders(){ if('placeholder' in document.createElement('input')){ //如果浏览器原生支持placeholder return ; } function target (e){ var e=e||window.event; return e.target||e.srcElement; }; function _getEmptyHintEl(el){ var hintEl=el.hintEl; return hintEl && g(hintEl); }; function blurFn(e){ var el=target(e); if(!el || el.tagName !='INPUT' && el.tagName !='TEXTAREA') return;//IE下,onfocusin会在div等元素触发 var emptyHintEl=el.__emptyHintEl; if(emptyHintEl){ //clearTimeout(el.__placeholderTimer||0); //el.__placeholderTimer=setTimeout(function(){//在360浏览器下,autocomplete会先blur再change if(el.value) emptyHintEl.style.display='none'; else emptyHintEl.style.display=''; //},600); } }; function focusFn(e){ var el=target(e); if(!el || el.tagName !='INPUT' && el.tagName !='TEXTAREA') return;//IE下,onfocusin会在div等元素触发 var emptyHintEl=el.__emptyHintEl; if(emptyHintEl){ //clearTimeout(el.__placeholderTimer||0); emptyHintEl.style.display='none'; } }; if(document.addEventListener){//ie document.addEventListener('focus',focusFn, true); document.addEventListener('blur', blurFn, true); } else{ document.attachEvent('onfocusin',focusFn); document.attachEvent('onfocusout',blurFn); } var elss=[document.getElementsByTagName('input'),document.getElementsByTagName('textarea')]; for(var n=0;n<2;n++){ var els=elss[n]; for(var i =0;i<els.length;i++){ var el=els[i]; var placeholder=el.getAttribute('placeholder'), emptyHintEl=el.__emptyHintEl; if(placeholder && !emptyHintEl){ emptyHintEl=document.createElement('span'); emptyHintEl.innerHTML=placeholder; emptyHintEl.className='placeholder'; emptyHintEl.onclick=function (el){return function(){try{el.focus();}catch(ex){}}}(el); if(el.value) emptyHintEl.style.display='none'; el.parentNode.insertBefore(emptyHintEl,el); el.__emptyHintEl=emptyHintEl; } } } } initPlaceHolders(); </script> html:text没有Placeholder属性下面这一段是为html:text添加Placeholder属性:personnelSearchVal为styleID<script language="JavaScript" type="text/JavaScript"> jQuery(function($) { $("#personnelSearchVal").attr('placeholder', '请输入全角文字'); });</script>之后模拟Placeholder属性功能就可以了,我没试过2楼的模拟Placeholder是不是好用 百度贴吧右上角的 提示有回复 的功能是怎么实现的? 表单提交路径问题 求助:用myeclipse的web项目中引入ckeditor后报错 tomcat报错 验证 一个js内嵌jsp的问题 请求大侠帮助,小弟先说声谢谢啦!急!急!急! 面试题,大家都来看看,能回答几题就回答几题! 请问怎么把表格里的某一行置顶? 怎么破豆瓣的反爬,还该怎么伪装爬虫 jsp实现多个条件查询功能 (java apache cxf)80分请教cxf发布webservices的异常问题。
span.placeholder {color:#999;position:absolute;padding:3px;}
</style><input tabindex="1" type="text" id="username" name="username" class="input required"
style='background-color:#FFF; border:1px #b5b8c8 solid;width: 180px; height: 20px; color:#666; line-height: 21px; text-indent: 5px;'
placeholder="请输入邮箱" />
<script>
function initPlaceHolders(){
if('placeholder' in document.createElement('input')){ //如果浏览器原生支持placeholder
return ;
}
function target (e){
var e=e||window.event;
return e.target||e.srcElement;
};
function _getEmptyHintEl(el){
var hintEl=el.hintEl;
return hintEl && g(hintEl);
};
function blurFn(e){
var el=target(e);
if(!el || el.tagName !='INPUT' && el.tagName !='TEXTAREA') return;//IE下,onfocusin会在div等元素触发
var emptyHintEl=el.__emptyHintEl;
if(emptyHintEl){
//clearTimeout(el.__placeholderTimer||0);
//el.__placeholderTimer=setTimeout(function(){//在360浏览器下,autocomplete会先blur再change
if(el.value) emptyHintEl.style.display='none';
else emptyHintEl.style.display='';
//},600);
}
};
function focusFn(e){
var el=target(e);
if(!el || el.tagName !='INPUT' && el.tagName !='TEXTAREA') return;//IE下,onfocusin会在div等元素触发
var emptyHintEl=el.__emptyHintEl;
if(emptyHintEl){
//clearTimeout(el.__placeholderTimer||0);
emptyHintEl.style.display='none';
}
};
if(document.addEventListener){//ie
document.addEventListener('focus',focusFn, true);
document.addEventListener('blur', blurFn, true);
}
else{
document.attachEvent('onfocusin',focusFn);
document.attachEvent('onfocusout',blurFn);
}
var elss=[document.getElementsByTagName('input'),document.getElementsByTagName('textarea')];
for(var n=0;n<2;n++){
var els=elss[n];
for(var i =0;i<els.length;i++){
var el=els[i];
var placeholder=el.getAttribute('placeholder'),
emptyHintEl=el.__emptyHintEl;
if(placeholder && !emptyHintEl){
emptyHintEl=document.createElement('span');
emptyHintEl.innerHTML=placeholder;
emptyHintEl.className='placeholder';
emptyHintEl.onclick=function (el){return function(){try{el.focus();}catch(ex){}}}(el);
if(el.value) emptyHintEl.style.display='none';
el.parentNode.insertBefore(emptyHintEl,el);
el.__emptyHintEl=emptyHintEl;
}
}
}
}
initPlaceHolders();
</script>
html:text没有Placeholder属性
下面这一段是为html:text添加Placeholder属性:
personnelSearchVal为styleID
<script language="JavaScript" type="text/JavaScript">
jQuery(function($) {
$("#personnelSearchVal").attr('placeholder', '请输入全角文字');
});
</script>之后模拟Placeholder属性功能就可以了,
我没试过2楼的模拟Placeholder是不是好用