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function test1()
{
var txt = document.form1.elements["custom"].value;
reg =/^[^"][0-9a-zA-Z~!@#$^&*()_+={}\[\]|'",.:?\/]*[^"]$/;
if(! reg.test(txt))
{
alert("contains invalid characters.");
}
else
{
alert("ok");
}
}
var reg = /^(?!"|[\d\D]*"$)[^;]*$/;
var reg = /^(?!")(?![\d\D]*"$)/;
if (!reg.test(txt)) {
// invalid
} else {
// ok
}
var txt = document.form1.elements["custom"].value;
reg =/^\".*|\"$/;
if(reg.test(txt))
{
alert("contains invalid characters.");
}
else
{
alert("ok");
}
function test1(txt)
{
var reg = /^[^"].*[^"]$/;
if(!reg.test(txt))
{
alert("contains invalid characters.");
}
else
{
alert("ok");
}
}
test1("a,a\"a,"); // ok
test1("\"a,a\"a,"); // contains invalid characters.