MyHtml.html
onload = function() {
alert("画面正常加载完了");
var txt = document.getElementById("text");
var label = document.getElementById("label");
txt.onkeyup = function() {
txt.value = txt.value.replace(/^\s+|\s+$/g, "");
if (txt.value == "") {
alert("请输入");
} else if (txt.value != "") {
if (/^\d+$/.test(txt.value)) {
label.style.color = "blue";
label.innerHTML = "都为半角数字";
} else if (/.*[^\x00-\xff].*/.test(txt.value)) {
label.style.color = "red";
label.innerHTML = "存在全角文字";
} else {
label.style.color = "black";
label.innerHTML = "正常输入";
}
}
}
}
var disp_alert = function() {
var label = document.getElementById("label");
label.innerHTML = "";
}
HTML&JS基础语法练习题
