javascript辅助方法--不断更新

有困难，找猪八戒
对js中的辅助方法进行收集，不断补充

/*得到四舍五入后的数值
* value:需要 四舍五入 的数值
* scale:需要保留的小数位
*/
function getScaled(value,scale){
	return Number(value.toFixed(scale));
}
/*得到四舍五入后的数值,小数位与scale相同，如果不足，后面补0
* value:需要 四舍五入 的数值
* scale:需要保留的小数位
*/
function getFixedScaled(value,scale){
	return value.toFixed(scale);
}

//回车则提交表单

	function checkEnter(e){ //e is event object passed from function invocation
		var characterCode;// character code will be stored in this variable
		if(e && e.which){ //if which property of event object is supported (NN4)
			e = e;
			characterCode = e.which; //character code is contained in NN4's which property
		}else{
			e = event;
			characterCode = e.keyCode; //character code is contained in IE's keyCode property
		}
		if(characterCode == 13){ //if generated character code is equal to ascii 13 (if enter key)
			document.forms[0].submit(); //submit the form
			return false;
		}else{
			return true;
		}
	}
  <FORM METHOD=POST ACTION="" onSubmit="alert(333);">
	<input type="text" onKeyPress="checkEnter(event)"> 
  </FORM>

有困难，找猪八戒