求助关于正则表达式,急啊.各位大侠请指教

Question

([\da-zA-Z\-_~!@#\$%\^&\*\.\(\)\[\]\{\}<>\?\/'\"])*([a-zA-Z]\d|\d[a-zA-Z]|[-_~!@#\$%\^&\*\.\(\)\[\]\{\}<>\?\/'\"]\d|\d[-_~!@#\$%\^&\*\.\(\)\[\]\{\}<>\?\/'\"]|[a-zA-Z][-_~!@#\$%\^&\*\.\(\)\[\]\{\}<>\?\/'\"]|[-_~!@#\$%\^&\*\.\(\)\[\]\{\}<>\?\/'\"][a-zA-Z])([\da-zA-Z\-_~!@#\$%\^&\*\.\(\)\[\]\{\}<>\?\/'\"])*

Answer 1

1.：function checkNum()
{
var reg=/^[A-Za-z0-9]+$/;
if(reg.test(window.document.Form1.txtNum.value) == false)
{
alert('错误！');
document.Form1.txtNum.focus();
return false;
}
}

Answer 2

上面写的丢了一些特殊字符，并且多写了好多"\"修正如下:
[\da-zA-Z\x20-\x2f:;<>=?@\[\]\\^-`{}|~]*([a-zA-Z]\d|\d[a-zA-Z]|[\x20-\x2f:;<>=?@\[\]\\^-`{}|~]\d|\d[ \x20-\x2f:;<>=?@\[\]\\^-`{}|~]|[a-zA-Z][\x20-\x2f:;<>=?@\[\]\\^-`{}|~]|[ \x20-\x2f:;<>=?@\[\]\\^-`{}|~][a-zA-Z])[\da-zA-Z\x20-\x2f:;<>=?@\[\]\\^-`{}|~]*