js创建表单并提交

	Util = {
			post : function(URL, PARAMS){ //虚拟表单实现post提交
				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];        
			        temp.appendChild(opt);        
			    }        
			    document.body.appendChild(temp);        
			    temp.submit();        
			    return temp;   
			}
	};