HTML 中
onkeyup="stripscript(this)";
function stripscript(obj) {
	var s = $(obj).val();
    var pattern = new RegExp("[`~@#$^&|\\<>/~@#¥&]")
        var rs = "";
    for (var i = 0; i < s.length; i++) {
        rs = rs + s.substr(i, 1).replace(pattern, ‘‘);
    }
    $(obj).val(rs);
}
原文:http://www.cnblogs.com/wjwen/p/4905700.html