限制只能输入数字

JS

window.onload = function(){
	var banNumber = document.getElementById("banNumber"),
			clearNonumber = function(tThis){		//过滤数字
				var _v = tThis.value;
				tThis.value = _v.replace(/\D/g,"");
			}
	banNumber.onfocus = function(){			//绑定获取焦点事件
		clearNonumber(this);
	}
	banNumber.onkeyup = function(){			//绑定键盘事件
		clearNonumber(this);
	}
	banNumber.onblur = function(){				//失去焦点事件
		clearNonumber(this);
	}
};