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Form object
Form object method
reset(): Resets all input elements of the form to their default values.
submit(): Submit the form.
Text object
Text object property
disabled: Sets or returns whether the text field should be disabled.
readOnly: Sets or returns whether the text field should be read-only.
value: Set or return the value of the value attribute of the text field.
Text object method
focus(): Set focus on the text field.
Example
Radio object
Radio object property
checked: Sets or returns the status of the radio button.
disabled: Sets or returns whether the radio button is disabled.
value: Sets or returns the value of the radio button's value attribute.
Checkbox object
Checkbox object property
checked: Sets or returns whether the checkbox should be checked.
disabled : Sets or returns whether the checkbox should be disabled.
value: Set or return the value of the value attribute of the checkbox
Select object
Select object collection
options[]: Returns an array containing all options in the drop-down list.
Select object property
disabled: Sets or returns whether the drop-down list should be disabled.
length: Returns the number of options in the drop-down list.
selectedIndex: Set or return the index number of the selected item in the drop-down list.
Select object method
add(): Add an option to the drop-down list.
remove(): Remove an option from the drop-down list.
Option object
Option object construction method
Option(text,value): Create an Option object through text and value values
Option Object Attribute
selected: Set or return the value of the selected attribute.
text: Sets or returns the plain text value of an option.
value: Set or return the value sent to the server.
Select object and Option object example
Registry
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a34de1251f0d9fe1e645927f19a896e8
b6c5a531a458a2e790c1fd6421739d1c用户名：b90dd5946f0946207856a8a37f441edf
b6c5a531a458a2e790c1fd6421739d1c66677a7cbdbf26f5b4be8dede2fe353db90dd5946f0946207856a8a37f441edf
fd273fcf5bcad3dfdad3c41bd81ad3e5
a34de1251f0d9fe1e645927f19a896e8
b6c5a531a458a2e790c1fd6421739d1c密码：b90dd5946f0946207856a8a37f441edf
b6c5a531a458a2e790c1fd6421739d1c9589aa3b033daf74e59b78a53d583ed9b90dd5946f0946207856a8a37f441edf
fd273fcf5bcad3dfdad3c41bd81ad3e5
a34de1251f0d9fe1e645927f19a896e8
b6c5a531a458a2e790c1fd6421739d1c确认密码：b90dd5946f0946207856a8a37f441edf
b6c5a531a458a2e790c1fd6421739d1c6d13c2159bf38342899a7d768b94f482b90dd5946f0946207856a8a37f441edf
fd273fcf5bcad3dfdad3c41bd81ad3e5
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3ea5dbfd399b8f71042a18725f567918男
ad881942639cffcc4579c376971b3fd0女
ff9d32c555bb1d9133a29eb4371c1213
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3e539ce442c5e67a6c62e8a5c36157f9篮球
ebae056c174c155368d696d5878bbb83乒乓球
a33e9cbdec54ff9234e2ba5d2597fa26足球
ff9d32c555bb1d9133a29eb4371c1213
f37074c1351f94297e4cf97b2ab2681e
859be17dfcd6af2d26185135fb5bd8fc大一4afa15d3069109ac30911f04c56f3338
656b9f2e82088a1bf3f244445950414e大二4afa15d3069109ac30911f04c56f3338
9403fa44e4282955565dbaeb33a85ca2大三4afa15d3069109ac30911f04c56f3338
0df899068b02ff57e98d12c8174c0b32大四4afa15d3069109ac30911f04c56f3338
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3f1c4e4b6b16bbbd69b2ee476dc4f83a
//使用$()函数可节省代码量
function $(id){
return document.getElementById(id);
}
function check(){
var n = document.getElementById("name");
var w = document.getElementById("pw");
var msg = document.getElementById("wrong-massage");
var c = document.getElementById("pw-check");
if(n.value.length>12){
msg.innerHTML = "用户名不能超过15个字符，请重新输入！";
n.focus();
return false;
}
if(n.value.length==0){
msg.innerHTML = "用户名不能为空，请重新输入！";
n.focus();
return false;
}
if(w.value.length>12){
msg.innerHTML = "密码不能超过12个字符，请重新输入！";
w.focus();
return false;
}
if(w.value.length==0){
msg.innerHTML = "密码不能为空，请重新输入！";
w.focus();
return false;
}
if(w.value!=c.value){
msg.innerHTML = "密码错误，请重新输入！";
c.focus();
return false;
}
var sex = document.getElementsByName("sex");
var hobby = document.getElementsByName("hobby");
for(var i=0;i515c4b6db14d7592195e587d6086cf6312){
msg.innerHTML = "用户名不能超过15个字符，请重新输入！";
n.value = "";
n.focus();
}
else if(n.value.length==0){
msg.innerHTML = "用户名不能为空，请重新输入！";
n.focus();
}
else{
msg.innerHTML = " ";
}
}
function check_pw(){
var w = document.getElementById("pw");
var msg = document.getElementById("wrong-massage");
if(w.value.length>12){
msg.innerHTML = "密码不能超过12个字符，请重新输入！";
w.value = "";
w.focus();
}
else if(w.value.length==0){
msg.innerHTML = "密码不匹配，请重新输入！";
w.focus();
}
else
{
msg.innerHTML = " ";
}
}
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Image object
Image object properties
src: Set or return the URL of the image.
related suggestion:
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