JavaScript常用的代码片段

HtmlEncode: function(str){
	return str.replace(/&/g, '&').replace(/\"/g, '"').replace(/</g, '<').replace(/>/g, '>').replace(/'/g, ''');
},

IsMobile: function(str){
	var rp = /^1[3|4|5|7|8][0-9]\d{4,8}$/;
	return rp.test(str);
},

IsTel: function(str){
	var rp = /^([0-9]{3,4}-)?[0-9]{7,8}$/;
	return rp.test(str);
},

WhichBrowser: function(){
	var userAgent = navigator.userAgent;

	var isOpera = userAgent.indexOf("Opera") > -1;
	var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera;
	var isFF = userAgent.indexOf("Firefox") > -1;
	var isCH = userAgent.indexOf("Chrome") > -1;
	var isSafari = userAgent.indexOf("Safari") > -1;

	if (isIE){
		var IE5 = IE55 = IE6 = IE7 = IE8 = false;
		var reIE = new RegExp("MSIE (\\d+\\.\\d+);");
		reIE.test(userAgent);
		var fIEVersion = parseFloat(RegExp["$1"]);
		IE55 = fIEVersion == 5.5;
		IE6 = fIEVersion == 6.0;
		IE7 = fIEVersion == 7.0;
		IE8 = fIEVersion == 8.0;
		if (IE55) {
			return "IE55";
		}
		if (IE6) {
			return "IE6";
		}
		if (IE7) {
			return "IE7";
		}
		if (IE8) {
			return "IE8";
		}
	}

	if (isFF) {
		return "Firefox";
	}
	if (isCH) {
		return "Chrome";
	}
	if (isOpera) {
		return "Opera";
	}
	if (isSafari) {
		return "Safari";
	}
},

GetCookie: function(c_name){
	if(document.cookie.length>0){
		c_start = document.cookie.indexOf(c_name + '=');
		if(c_start != -1){
			c_start = c_start + c_name.length + 1;
			c_end = document.cookie.indexOf(';',c_start);
			if (c_end==-1) c_end = document.cookie.length;
			return unescape(document.cookie.substring(c_start,c_end));
		}
	}
	return '';
},

SetCookie: function(c_name, value, expiredays){
	var exdate = new Date();
	exdate.setDate(exdate.getDate() + expiredays);
	document.cookie = c_name + "=" + escape(value) + ((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
},
};

function cutstr(str, len) {
    var temp,
        icount = 0,
        patrn = /[^\x00-\xff]/，
        strre = "";
    for (var i = 0; i < str.length; i++) {
        if (icount < len - 1) {
            temp = str.substr(i, 1);
                if (patrn.exec(temp) == null) {
                   icount = icount + 1
            } else {
                icount = icount + 2
            }
            strre += temp
            } else {
            break;
        }
    }
    return strre + "..."
}

String.prototype.replaceAll = function(s1, s2) {
    return this.replace(new RegExp(s1, "gm"), s2)
}

String.prototype.trim = function() {
    var reExtraSpace = /^\s*(.*?)\s+$/;
    return this.replace(reExtraSpace, "$1")
}

function ltrim(s){ return s.replace( /^(\s*|　*)/, ""); }
function rtrim(s){ return s.replace( /(\s*|　*)$/, ""); }

String.prototype.startWith = function (s) {
    return this.indexOf(s) == 0
}

String.prototype.endWith = function (s) {
    var d = this.length - s.length;
    return (d >= 0 && this.lastIndexOf(s) == d)
}

function HtmlEncode(text) {
    return text.replace(/&/g, '&').replace(/\"/g, '"').replace(/</g, '<').replace(/>/g, '>')
}

Date.prototype.Format = function(formatStr) {
    var str = formatStr;
    var Week = ['日', '一', '二', '三', '四', '五', '六'];
    str = str.replace(/yyyy|YYYY/, this.getFullYear());
    str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : '0' + (this.getYear() % 100));
    str = str.replace(/MM/, (this.getMonth() + 1) > 9 ? (this.getMonth() + 1).toString() : '0' + (this.getMonth() + 1));
    str = str.replace(/M/g, (this.getMonth() + 1));
    str = str.replace(/w|W/g, Week[this.getDay()]);
    str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : '0' + this.getDate());
    str = str.replace(/d|D/g, this.getDate());
    str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : '0' + this.getHours());
    str = str.replace(/h|H/g, this.getHours());
    str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : '0' + this.getMinutes());
    str = str.replace(/m/g, this.getMinutes());
    str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : '0' + this.getSeconds());
    str = str.replace(/s|S/g, this.getSeconds());
    return str
}

function isDigit(value) {
    var patrn = /^[0-9]*$/;
    if (patrn.exec(value) == null || value == "") {
        return false
    } else {
        return true
    }
}

function setCookie(name, value, Hours) {
    var d = new Date();
    var offset = 8;
    var utc = d.getTime() + (d.getTimezoneOffset() * 60000);
    var nd = utc + (3600000 * offset);
    var exp = new Date(nd);
    exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000);
    document.cookie = name + "=" + escape(value) + ";path=/;expires=" + exp.toGMTString() + ";domain=360doc.com;"
}

function getCookie(name) {
    var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
    if (arr != null) return unescape(arr[2]);
    return null
}