常用JS

//下拉框获取值

<select id="deptSelect" onchange="deptChange()">

  <option value="0">全市</option>
</select>

alert($('#deptSelect').val());
alert($("#deptSelect").find("option:selected").text());

//时间格式化
function smartTimeAgo(date){
    var time=new Date().getTime();
    time=parseInt((time-date)/1000);
    
    var s="";
    if(time<60*10){
        //十分钟内
        return '刚刚';
    }else if((time<60*60)&&(time>=60*10)){
        //超过十分钟少于1小时
        s = Math.floor(time/60);
        return  s+"分钟前";
    }else if((time<60*60*24)&&(time>=60*60)){ 
        //超过1小时少于24小时
        s = Math.floor(time/60/60);
        return  s+"小时前";
    }else if((time<60*60*24*3)&&(time>=60*60*24)){ 
        //超过1天少于3天内
        s = Math.floor(time/60/60/24);
        return s+"天前";
    }else{ 
        //超过3天
        var date= new Date(parseInt(date));
        return date.getFullYear()+"/"+(date.getMonth()+1)+"/"+date.getDate();
    }
}

/*关键词检索高亮标出
 *param idHtmlContent 需要检索的HTML内容ID
 *param keyword 关键字，多个以空格隔开
 */
function keywordHighlight(idHtmlContent,keyword) {
    var content= $("#"+idHtmlContent).html();//获取内容
    if ($.trim(keyword)==""){
        return;//关键字为空则返回
    }
    var htmlReg = new RegExp("<.*?>", "i");
    var arrA = new Array();
    //替换HTML标签
    for (var i = 0; true; i++) {
        var m = htmlReg.exec(content);
        if (m) {
            arrA[i] = m;
        }else {
            break;
        }
        content = content.replace(m, "{[(" + i + ")]}");
    }
    words = unescape(keyword.replace(/+/g, ' ')).split(/s+/);
    //替换关键字 
    for (w = 0; w < words.length; w++) {
        var r = new RegExp("(" + words[w].replace(/[(){}.+*?^$|\[]]/g, "\$&") + ")", "ig");
        content = content.replace(r, "<b><span style='color:red;font-size:14px;'><u>"+words[w]+"</u></span></b>");//关键字样式
    }
    //恢复HTML标签 
    for (var i = 0; i < arrA.length; i++) {
        content = content.replace("{[(" + i + ")]}", arrA[i]);
    }
     $("#"+idHtmlContent).html(content);
}