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在HTML中的INPUT文本框text只能输入数字和1个小数点.txt
让html的text只能输入数字和1个小数点` 使按键按不下
关键字: html text 输入 数字 小数点
Html代码
Hifunction check(event) {
var e = window.event || event;
var target = e.srcElement || e.target;
var k = e.keyCode;
if(isFunKey(k)) {
return true;
}
var c = getChar(k);
if(target.value.length == '' && (c == '-' || c == '+')) {
return true;
}
if(isNaN(target.value + getChar(k))) {
return false;
}
return true;
}
function isFunKey(code) {
// 8 --> Backspace
// 35 --> End
// 36 --> Home
// 37 --> Left Arrow
// 39 --> Right Arrow
// 46 --> Delete
// 112~123 --> F1~F12
var funKeys = [8, 35, 36, 37, 39, 46];
for(var i = 112; i <= 123; i++) {
funKeys.push(i);
}
for(var i = 0; i < funKeys.length; i++) {
if(funKeys[i] == code) {
return true;
}
}
return false;
}
function getChar(k) {
if(k >= 48 && k <= 57) {
return String.fromCharCode(k);
}
if(k >= 96 && k <= 105) {
return String.fromCharCode(k - 48);
}
if(k == 110 || k == 190) {
return ".";
}
if(k == 109 || k == 189) {
return "-";
}
if(k == 107 || k == 187) {
return "+";
}
return "#";
}
textarea {
width: 200px;
height: 80px;
}
span {
color: #ff0000;
}
Hifunction check(event) {
var e = window.event || event;
var target = e.srcElement || e.target;
var k = e.keyCode;
if(isFunKey(k)) {
return true;
}
var c = getChar(k);
if(target.value.length == '' && (c == '-' || c == '+')) {
return true;
}
if(isNaN(target.value + getChar(k))) {
return false;
}
return true;
}
function isFunKey(code) {
// 8 --> Backspace
// 35 --> End
// 36 --> Home
// 37 --> Left Arrow
// 39 --> Right Arrow
// 46 --> Delete
// 112~123 --> F1~F12
var funKeys = [8, 35, 36, 37, 39, 46];
for(var i = 112; i <= 123; i++) {
funKeys.push(i);
}
for(var i = 0; i < funKeys.length; i++) {
if(funKeys[i] == code) {
return true;
}
}
return false;
}
function getChar(k) {
if(k >= 48 && k <= 57) {
return String.fromCharCode(k);
}
if(k >= 96 && k <= 105) {
return String.fromCharCode(k - 48);
}
if(k == 110 || k == 190) {