js过滤特殊字符输入适合输入、粘贴、拖拽多种情况_javascript技巧

if (type == "input") {
code = window.event.keyCode;
}
else if (type == "paste") {
code = window.clipboardData.getData('Text');

}
else if (type == "Drop") {
code = window.event.dataTransfer.getData('Text');

}
else {
code = arguments.callee.caller.arguments[0].which;
}
var character = String.fromCharCode(code);
var txt = new RegExp("[\\*,\\&,\\\\,\\/,\\?,\\|,\\:,\\<,\\>,\"]");
if (type == "input") {
if (txt.test(character)) {
alert(err_msg);
if (document.all) {
window.event.returnValue = false;
}
else {
arguments.callee.caller.arguments[0].preventDefault();
}
}
}
if (type == "paste" || type == "Drop") {
if (txt.test(code)) {
alert(err_msg);
window.event.returnValue = false;
}
}
}