function getFormValues(formId)
{
	var form = document.getElementById(formId);
	var params = '';
	for(var i= 0; i < form.length; i++)
	{
		if(isset(form[i].type))
		{
			if(form[i].type == 'checkbox' || form[i].type == 'hidden' || form[i].type == 'radio')
			{
				var add = true;
				if(form[i].type == 'checkbox' || form[i].type == 'radio')
					if(form[i].checked == false)
						add = false;
				if(add == true)
				{
					if(params != '')
						params += '&'
					params += form[i].name + "=" + form[i].value;
				}
			}
		}
	}
	return params;
}

function isset () {
    // http://kevin.vanzonneveld.net
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: FremyCompany
    // +   improved by: Onno Marsman
    // *     example 1: isset( undefined, true);
    // *     returns 1: false
    // *     example 2: isset( 'Kevin van Zonneveld' );
    // *     returns 2: true
    
    var a=arguments, l=a.length, i=0;
    
    if (l===0) {
        throw new Error('Empty isset'); 
    }
    
    while (i!==l) {
        if (typeof(a[i])=='undefined' || a[i]===null) { 
            return false; 
        } else { 
            i++; 
        }
    }
    return true;
}