实例详解javascript中split字符串分割函数

<script>

    var str = "一二三四";

    var str1 = "篮球、排球、乒乓球";

    var arr = str.split("");//全部分割

    var arr1 = str1.split("、");//按照顿号分割

    var arr2 = str1.split("、",2);//按照顿号分割,保留两段

</script>

<input id="x" type="text"/>

<input id="x" type="text"/><input type="button" onclick="x()" value="输入邮件地址，获取用户名"/>

<script>

<script>

function x(){

    var x=document.getElementById("x").value.toString();

    var c=x.split("@");

    document.getElementById("x").value=c[0];

}

</script>