问：我只想输入HTML或Javascript中的数字。有哪些不同的方法？谢谢。
答：html输入上的验证，例如number
可以使用javascript来检查输入上的验证，
可以使用jquery或jquery验证引擎之类的库
答：// Restricts input for the given textbox to the given inputFilter.
function setInputFilter(textbox, inputFilter) {
["input", "keydown", "keyup", "mousedown", "mouseup", "select", "contextmenu", "drop"].forEach(function(event) {
textbox.oldValue = "";
textbox.addEventListener(event, function() {
if (inputFilter(this.value)) {
this.oldValue = this.value;
this.oldSelectionStart = this.selectionStart;
this.oldSelectionEnd = this.selectionEnd;
} else if (this.hasOwnProperty("oldValue")) {
this.value = this.oldValue;
this.setSelectionRange(this.oldSelectionStart, this.oldSelectionEnd);
}
});
});
}
// Restrict input to digits and '.' by using a regular expression filter.
setInputFilter(document.getElementById("myTextBox"), function(value) {
return /^\d*\.?\d*$/.test(value);
});
