限制文本框只输出数字
方法一:
<input type="text" class="inputface" name="qczs" maxlength="2" style="width:25px;" onkeyup="this.value=this.value.replace(/\D/g,'')" onafterpaste="this.value=this.value.replace(/\D/g,'')" />
<input type="text"
onkeypress = 'return /^\d$/.test(String.fromCharCode(event.keyCode))'
oninput= 'this.value = this.value.replace(/\D+/g, "")'
onpropertychange='if(!/\D+/.test(this.value)){return;};this.value=this.value.replace(/\D+/g, "")'
onblur = 'this.value = this.value.replace(/\D+/g, "")'/>
上面四事件组合,兼容Firefox、IE、Chrome。
JS实现
<
script
type
=
"text/javascript"
>
function getEvent() {
if (document.all) {
return window.event; //for ie
}
func = getEvent.caller;
while (func != null) {
var arg0 = func.arguments[0];
if (arg0) {
if ((arg0.constructor == Event || arg0.constructor == MouseEvent) || (typeof (arg0) == "object" && arg0.preventDefault && arg0.stopPropagation)) {
return arg0;
}
}
func = func.caller;
}
return null;
}
function doit(){
var ev = getEvent();
if(ev.keyCode < 48 || ev.keyCode > 57) return false;
}
</
script
>
<
input
type
=
"text"
id
=
"txt"
onkeydown
=
"return doit()"
>