JS如何赋值给文本框?

Question

<script>

function ReadCookie(){
alert(getCookie("UserEmail").split(","));
}
function getCookie(objName){//获取指定名称的cookie的值
    var arrStr = document.cookie.split("; ");
    for(var i = 0;i < arrStr.length;i ++){
     var temp = arrStr[i].split("=");
     if(temp[0] == objName) return unescape(temp[1]);
    }
   }
var cookie_val = getCookie("UserEmail");

</script>
<form name="addform" action="" method="get">
<input type="button" value="查看保存的COOKIES值" onclick="ReadCookie()">
<input type="text" id="txt1" value="" name="mail" onclick="ReadCookie()">
</form>
如何把cookie_val 的值赋给下面那个的文本框，直接显示出来，现在是点击下才显示

Answer 1

格式：selector.value = '赋值内容'，举例：

// ID为Text的文本框赋值为“1”
document.getElementById('Text').value = '1';

Answer 2

有一个onlocal事件啊，用这个事件，加载的时候文本框就有值了

Answer 3

document.getElementById("text_box_id").innerHTML = "your text";

Answer 4

<script>

function ReadCookie(){
alert(getCookie("UserEmail").split(","));
}
function getCookie(objName){//获取指定名称的cookie的值
var arrStr = document.cookie.split("; ");
for(var i = 0;i < arrStr.length;i ++){
var temp = arrStr[i].split("=");
if(temp[0] == objName) return unescape(temp[1]);
}
}
var cookie_val = getCookie("UserEmail");
window.onload = ReadCookie();
</script>
<form name="addform" action="" method="get">
<input type="button" value="查看保存的COOKIES值" onclick="ReadCookie()">
<input type="text" id="txt1" value="" name="mail" onclick="ReadCookie()">
</form>
这样就能把cookie_val 的值赋给下面那个的文本框，直接显示出来

Answer 5

<script>
function ReadCookie(){
alert(getCookie("UserEmail").split(","));
}
function getCookie(objName){//获取指定名称的cookie的值
var arrStr = document.cookie.split("; ");
for(var i = 0;i < arrStr.length;i ++){
var temp = arrStr[i].split("=");
if(temp[0] == objName) return unescape(temp[1]);
}
}
var cookie_val = getCookie("UserEmail");
window.onload=function(){document.getElementById("mail").value=cookie_val}
</script>
<form name="addform" action="" method="get">
<input type="button" value="查看保存的COOKIES值" onclick="ReadCookie()">
<input type="text" id="mail" value="" name="mail" onclick="ReadCookie()">
</form>本回答被提问者和网友采纳