Код:
<form ...>
<input
type="button"
value=" Button "
onclick="this.value=' New Value ';this.form.foo.value=' Hidden ';" />
<input
type="hidden"
name="foo"
value="" />
<form ...>
<input
type="button"
value=" Button "
onclick="this.value=' New Value ';this.form.foo.value=' Hidden ';" />
<input
type="hidden"
name="foo"
value="" />
<form ...>
<input
type="button"
value=" Button "
id="button"
onclick="change()" />
<input
type="hidden"
name="foo"
value=""
id="hidden"/>
function change() {
document.getElementById('button').value=' New Value ';
document.getElementById('hidden').value=' Hidden ';
}
<script>
function change() {
if (document.getElementById('button').value == '4:3') {
document.getElementById('button').value='16:9';
}
if (document.getElementById('button').value == '16:9') {
document.getElementById('button').value='16:10';
}
if (document.getElementById('button').value == '16:10') {
document.getElementById('button').value='4:3';
}
}
</script>
<form>
<input type="button" value="4:3" id="button" onclick="change()" />
</form>