js post提出方法

function post(URL, PARAMS) {        
            var temp = document.createElement("form"); 
            temp.action = URL; 
            temp.method = "post"; 
            temp.style.display = "none"; 
            for (var x in PARAMS) {        
                var opt = document.createElement("textarea"); 
                opt.name = x; 
                opt.value = PARAMS[x]; 
                // alert(opt.name)        
                temp.appendChild(opt); 
            }        
            document.body.appendChild(temp); 
            temp.submit(); 
            return temp; 
        } 

post('url', {param1:value1,param2:value2,param3:value3,...});