小笔记

阻止冒泡：
$(".xxx").bind("click", function() {
window.event ? window.event.cancelBubble = true : e.stopPropagation();
})

阻止冒泡兼容火狐等大部分浏览器：

//给弹出层绑定点击事件，阻止冒泡2
$(".dbuybody").bind("click", function(e) {
preventBubble();
// window.event ? window.event.cancelBubble = true : e.stopPropagation();
})

function preventBubble(event) {
var e = arguments.callee.caller.arguments[0] || event; //若省略此句，下面的e改为event，IE运行可以，但是其他浏览器就不兼容
if (e && e.stopPropagation) {
e.stopPropagation();
} else if (window.event) {
window.event.cancelBubble = true;
}
}

兼容ie7的display: inline-block;
加上*zoom: 1;*display: inline;

多行显示限制：
overflow: hidden;
display: -webkit-box;
-webkit-box-orient: vertical;
-webkit-line-clamp: 3;
flex-direction: column;
text-overflow: ellipsis;

算页码：
var pages = Math.ceil(count / limit);

获取头部参数
function GetQueryString(name) {
var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i"); //获得页面url的某个url参数的方法
var r = window.location.search.substr(1).match(reg); //从问号 (?) 开始的 URL（查询部分）
if (r != null) return decodeURI(r[2]); return null; //decodeURI(URIstring) 对一个编码后的URI进行解码
}

^匹配字符串开头,&就是&字符
(^|&)匹配字符串开头或者&字符，如果其后还有正则，那么必须出现在字符串开始或&字符之后

input、textarea的placeholder如果改变样式：

input:-ms-input-placeholder,

                        textarea:-ms-input-placeholder {

                            font-size: 14px;

                            font-weight: 500;

                            color: #999999;

                            line-height: 1; 

                        }

                        input::-webkit-input-placeholder,

                        textarea::-webkit-input-placeholder {

                            font-size: 14px;

                            font-weight: 500;

                            color: #999999;

                            line-height: 1;

                        }

                        input:-moz-placeholder,

                        textarea:-moz-placeholder {

                            font-size: 14px;

                            font-weight: 500;

                            color: #999999;

                            line-height: 1;

                        }

                        input::-moz-placeholder,

                        textarea::-moz-placeholder {

                            font-size: 14px;

                            font-weight: 500;

                            color: #999999;

                            line-height: 1;

                        }

此时发现火狐浏览器下placeholder偏上，为了兼容火狐只能写死line-height来解决，但是ios的Safari容易不兼容，需要重新规定ios下的line-height