[bes]

<form action="http://javascript.ru" method="get">
	<a href="#" class="style1">param 1</a><a href="#" class="style2">param 1</a>
	<a href="#" class="style1">param 2</a><a href="#" class="style2">param 2</a>
	<input type="hidden" name="name[nameid]">
</form>

<script>
window.onload = function () {
	document.forms[0].onclick = function (e)  {
		var inp = this.children[this.children.length - 1];//здесь получаем ссылку на input
		e = e || event;
		var target = e.target || e.srcElement;
		if (target.tagName == 'A') {
			if (target == this.children[0] || target == this.children[1]) {
				inp.value = 1;
			} else {
				inp.value = 2;
			}
			alert(inp.value)
			this.submit();
		}
	}
}
</script>