html+javaScript只能输入0-100正整数
作者：互联网
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<script>
//当单击文本框中时选中所有文本
function selectText(selectAll) {
selectAll.select();//选中框中的所有文本;
}
只能输入0-100
function numberTesting(id,value) {
if(id.name=="Opacity"){
var reg =/^0+(?=\d)|\D|^[2-9]0(?=[0-9])|^[1-9]+?(?=[1-9][0-9])|^10(?=[1-9])/;//只能输入0-100
value=value.replace(reg,'');
console.log("1:"+value);
id.value=value;
}
}
</script>
</head>
<body style="background-color: #a2a1a3;" >
<form>
<input type="text" id="OpacityID" name="Opacity" class="textSize" value='100' onclick="selectText(this)" maxlength="3" onkeyup="numberTesting(this,this.value)">
</form>
</body>
</html>
标签：selectAll,function,javaScript,value,reg,html,100,id 来源： https://blog.csdn.net/cyj51060/article/details/112060796