复制代码 代码如下:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Test</title>
<script type="text/javascript" src="jQuery/jquery-1.5.2.js"></script>
</head>
<script type="text/javascript">
$(document).ready(function() {
//敲击按键时触发
$("#Score").bind("keypress", function(event) {
var getValue = $(this).val();
//控制第一个不能输入小数点"."
if (getValue.length == 0 && event.which == 46) {
event.preventDefault();
return;
}
//控制只能输入一个小数点"."
if (getValue.indexOf('.') != -1 && event.which == 46) {
event.preventDefault();
return;
}
//控制只能输入的值
if (event.which && (event.which < 48 || event.which > 57) && event.which != 8 && event.which != 46) {
event.preventDefault();
return;
}
})
//失去焦点是触发
$("#Score").bind("blur", function(event) {
var value = $(this).val(), reg = /.$/;
if (reg.test(value)) {
value = value.replace(reg, "");
$(this).val(value);
}
})
});
</script>
<body>
<input type="text" id="Score" />
</body>
</html>