function change()
{
	if(document.thisform.cb_sail.checked || document.thisform.cb_charter.checked){
		document.getElementById('boats').style.display='block';
		document.getElementById('dates').style.display='block';
	}else{ 
		document.getElementById('boats').style.display='none';
		document.getElementById('boats').value='';
		document.getElementById('dates').style.display='none';
		document.getElementById('dates').value='';
	}
}

function getParams() 
{
	var idx = document.URL.indexOf('?');
	var tempParams = new Object();
	if (idx != -1) {
		var pairs = document.URL.substring(idx+1, document.URL.length).split('&');
		for (var i=0; i<pairs.length; i++) {
			nameVal = pairs[i].split('=');
			tempParams[nameVal[0]] = nameVal[1];
		}
	}
	return tempParams;
}