function checkbox(formName, checkboxName) {
		var checkboxes = document.forms[formName].length;
		var i;
		for(i=0; i<checkboxes; i++) {
			if(document.forms[formName][i].type == 'checkbox') {
				if(document.forms[formName][i].id != checkboxName && document.forms[formName][i].id != 'lastminute') {
					if(checkboxName == 'beach') {
						if(document.forms[formName].beach.checked == true) {
							document.forms[formName][i].checked = false; 
						}
					} else if(checkboxName == 'familly') {
						if(document.forms[formName].familly.checked == true) {
							document.forms[formName][i].checked = false; 
						}
					} else if(checkboxName == 'exacting') {
						if(document.forms[formName].exacting.checked == true) {
							document.forms[formName][i].checked = false; 
						}
					} else if(checkboxName == 'sun') {
						if(document.forms[formName].sun.checked == true) {
							document.forms[formName][i].checked = false; 
						}
					} else if(checkboxName == 'love') {
						if(document.forms[formName].love.checked == true) {
							document.forms[formName][i].checked = false; 
						}
					} else if(checkboxName == 'egzotic') {
						if(document.forms[formName].egzotic.checked == true) {
							document.forms[formName][i].checked = false; 
						}
					} else if(checkboxName == 'europe') {
						if(document.forms[formName].europe.checked == true) {
							document.forms[formName][i].checked = false; 
						}
					} else if(checkboxName == 'ski') {
						if(document.forms[formName].ski.checked == true) {
							document.forms[formName][i].checked = false; 
						}
					}
				}
			}
		}
}