正则

KL.Util = {
	isEmail : function(v) {
		return /^([a-zA-Z0-9_\.\-\+])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/
				.test(v);
	},
	isMobile : function(v) {
		return /^[0]?[1][0-9]{10}$/.test(v);
	},
	isUrl : function(v) {
		return v == "" ? true
				: new RegExp(
						"^https?:\\/\\/([\\w-]+(\\.[\\w-]+)+(\\/[\\w-   .\\/\\?%@&+=\\u4e00-\\u9fa5]*)?)?$")
						.test(v);
	},
	// 鑾峰彇瀛楃涓蹭腑鏂囬暱搴�
	cnStrlen : function(str) {
		var thelen = str.replace(/[^\x00-\xff]/g, "**").length / 2;
		return parseInt(thelen) == thelen ? thelen : parseInt(thelen + 0.5);
	},

	reload: function (tohome) {
		if (tohome === true) {
			window.location.href = this.sitehost;
		} else {
			window.location.reload();
		}
	}
};

去掉字符串前面的0
var numString = "000123456789987654321";
alert(numString.replace(/^0+/g, ''));    //若是用 parseInt 有数字大小限制