web前端学习笔记

js替换内容

var test = "hi, everyone, this is just a test";
var res = test.replace("e"," "); 只会替换第一个e
alert(res);  
var resu = test.replace(/e/g, " ");替换所有e
alert(resu);

js验证是否有中文

var tt = "hello world!";
var t = "hello你好";
alert(escape(tt).indexOf("%u"));  -1
alert(escape(t).indexOf("%u"));   5

 让div中的table居中

div{
     text-align:center;//适用于ie
}
table{
     margin: auto;//适用于firefox
}