1、阻止輸入非數字，backspace除外

復制代碼 代碼如下:

<script type="text/javascript">
var checkNo = function(e){
var keyCode = e.charCode ? e.which : e.keyCode;
if(keyCode == 8){
return true;
}
var realkey = String.fromCharCode(keyCode);
var reg = "http://d";
var regExp = new RegExp(reg);
return regExp.test(realkey);
}
</script>

復制代碼 代碼如下:

//限制最大輸入長度
var checkMaxL = function(length) {
var regC = /[^ -~]+/g;
var regE = //D+/g;
var str = jQuery("#remark").val();

if (regC.test(str)){
jQuery("#remark").val(str.substring(0, length));
}

if(regE.test(str)){
jQuery("#remark").val(str.substring(0, length));
}
}