function prepare(form_name) {
	var form = eval("document."+form_name);
	var data = "";
	for(i=0;i<(form.elements.length-1);i++) {
		var l = eval(form.elements[i]);
		switch(l.type) {
			case "checkbox": 
				if(l.checked==1) {
					data+=l.name+"="+l.value+"&";
				}
				break;
			case "radio": 
				if(l.checked==1) {
					data+=l.name+"="+l.value+"&";
				}
				break;
			case "select-one":
				data+=l.name+"="+l.options[l.selectedIndex].value+"&";
				break;
			default:
				data+=l.name+"="+escape(l.value)+"&";
			}
	}
	return (data.substr(0,(data.length-1)));
}