// PARSE PARAMS
function parseParams(params){
    
    var contenedor = '';
    
    for(var contar in params){
        
        var type = gettype(params[contar]);
        
        if(type == 'checkbox' || type == 'radio'){
            
            contenedor += params[contar]+'='+getcheck(params[contar])+'&';
            
        }else if(type == 'select-multiple'){
            
            contenedor += params[contar]+'='+getMultiple(params[contar])+'&';
            
        }else{
            
            contenedor += params[contar]+'='+escape(getval(params[contar]))+'&';
            
        }
        
    }
    
    return contenedor.substr(0,contenedor.length-1);
    
}

// GETTERS AND SETTERS
function setval(id,val){
    document.getElementById(id).value = val;
}

function getval(id){
    return document.getElementById(id).value;
}

function getcheck(id){
    return document.getElementById(id).checked;
}

function gettype(id){
    return document.getElementById(id).type;
}

function getMultiple(ob){
    ob = document.getElementById(ob);
    selected = new Array();
    for(var i = 0; i < ob.options.length; i++) if(ob.options[i].selected) selected.push(ob.options[i].value);
    return selected;
}