js，正则应用

//获取URL中的request参数
function getUrlParam(name) {
var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
var r = window.location.search.substr(1).match(reg);
if (r != null)
{ return decodeURIComponent(r[2]); }
else
{ return ""; }
}
//获取URL中的request参数
function getUrlParamByName(name) {
var reg = new RegExp("-(.*?)\.html");
var r = window.location.href.match(reg);
var str = "";
if (r != null) {
str = decodeURIComponent(r[0]);
}
str = str.substring(1, str.lastIndexOf(".html")).trim();
if (str == null || str.length <= 0) {
str = getUrlParam(name);
}
return str;
}
//弹出窗口,无滚动条
function openNoBarWin(url, widths, heights) {
var features = "height=" + heights + ", width=" + widths + ", toolbar =yes, menubar=no, scrollbars=no, resizable=yes, location=no, status=no,top=200,left=200";
var w = window.open(url, "newwindow", features);
w.focus();
}
//弹出窗口,有滚动条
function openNoScroBarWin(url, widths, heights) {
var features = "height=" + heights + ", width=" + widths + ", toolbar =yes, menubar=no, scrollbars=yes, resizable=yes, location=no, status=no,top=200,left=200";
var w = window.open(url, "newwindow", features);
w.focus();
}
//弹出普通IE窗口
function openNormalWin(url, widths, heights) {
var features = "height=" + heights + ", width=" + widths + ", toolbar =yes, menubar=yes, scrollbars=yes, resizable=yes, location=yes, status=yes";
var w = window.open(url, "newwindow", features);
w.focus();
}
function ViewProfile(urid) {
openNormalWin("/Web/Profile/index.aspx?userid=" + urid + "&RndCode=" + UrlRndCode, "900", "480");
}
//鼠标经过弹出层
function ShowTitleContent(TitleContent) {
var event = new Event(event);
$("mouseshow").style.display = "block";
$("mouseshow").innerHTML = '<img style="position:absolute; left:-7px; top:5px;" src="/Images/Hqen/tipArrow_blue.gif" alt="" />' + TitleContent;
var eImg = $(event.target);
$("mouseshow").style.left = ((eImg.getLeft()) + 20) + "px";
$("mouseshow").style.top = ((eImg.getTop()) + 2) + "px";
}
function HiddenTitleContent() {
$("mouseshow").style.display = "none";
}
function getContentHtml() {
var str = document.getElementById('Editor').contentWindow.document.getElementById('HtmlEditor').contentWindow.document.getElementsByTagName("BODY")[0].innerHTML;
//alert(str);
return str;
}
//把数据库里的"\n"替换成<br>
function Db2HTML(str) {
if (str == null || str == "")
return "";
var strtmp = str;
// strtmp = strtmp.replace("\n","<br>");
strtmp = (strtmp.replace(new RegExp("\n", "gm"), "<br>"));
strtmp = (strtmp.replace(new RegExp(" ", "gm"), "&nbsp;&nbsp;"));
return strtmp;
}
//把<br>的替换成\n
function HTML2Db(str) {
if (str == null || str == "")
return "";
var strtmp = str;
strtmp = (strtmp.replace(new RegExp("<br>", "gm"), "\n"));
strtmp = (strtmp.replace(new RegExp("&nbsp;", "gm"), " "));
return strtmp;
}
//去掉前后的空格
function Trim(str) {
return str.replace(/(^\s*)|(\s*$)/g, "");
}
//去掉左边的空格
function Ltrim(str) {
return str.replace(/(^\s*)/g, "");
}
//去掉右边的空格
function Rtrim(str) {
return str.replace(/(\s*$)/g, "");
}
//将空字符替换成Null
function CheckNull(text) {
if (text == null) {
return null;
}
else if (text != null) {
text = text.replace(/(^\s*)|(\s*$)/g, "");
if (text == "") {
return null;
}
else {
return text;
}
}
}
//验证是否为整数
function IsNumber(str) {
var exp = /[^0-9()-]/g;
if (str.search(exp) != -1) {
return false;
}
return true;
}
//验证是否为正整数
function IsPlusNumber(str) {
var exp = /[^0-9()]/g;
if (str.search(exp) != -1) {
return false;
}
return true;
}
//乘法函数，用来得到精确的乘法结果
//说明：javascript的乘法结果会有误差，在两个浮点数相乘的时候会比较明显。这个函数返回较为精确的乘法结果。
//调用：accMul(arg1,arg2)
//返回值：arg1乘以arg2的精确结果
function ConvertMul(arg1, arg2) {
var m = 0, s1 = arg1.toString(), s2 = arg2.toString();
try { m += s1.split(".")[1].length; } catch (e) { }
try { m += s2.split(".")[1].length; } catch (e) { }
return Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m);
}
//加法函数，用来得到精确的加法结果
//说明：javascript的加法结果会有误差，在两个浮点数相加的时候会比较明显。这个函数返回较为精确的加法结果。
//调用：accAdd(arg1,arg2)
//返回值：arg1加上arg2的精确结果
function ConvertAdd(arg1, arg2) {
var r1, r2, m;
try { r1 = arg1.toString().split(".")[1].length; } catch (e) { r1 = 0; }
try { r2 = arg2.toString().split(".")[1].length; } catch (e) { r2 = 0; }
m = Math.pow(10, Math.max(r1, r2));
return (arg1 * m + arg2 * m) / m;
}
//减法函数，用来得到精确的减法结果
//说明：javascript的减法结果会有误差，在两个浮点数相加的时候会比较明显。这个函数返回较为精确的加法结果。
//调用：ConvertSub(arg1,arg2)
//返回值：arg1减去arg2的精确结果
function ConvertSub(arg1, arg2) {
var r1, r2, m;
try { r1 = arg1.toString().split(".")[1].length; } catch (e) { r1 = 0; }
try { r2 = arg2.toString().split(".")[1].length; } catch (e) { r2 = 0; }
m = Math.pow(10, Math.max(r1, r2));
return (arg1 * m - arg2 * m) / m;
}
//验证是否为金额格式，只精确两位小数。
function CheckIsMoney(str) {
if (str == "" || str == null) {
return true;
}
if (/^[+]?\d*\.{0,1}\d{0,2}$/.test(str)) {
return true;
}
else {
return false;
}
}
//验证是否为金额格式，只精确一位小数。
function CheckIsDecimalMoney(str) {
if (str == "" || str == null) {
return true;
}
if (/^[+]?\d*\.{0,1}\d{0,1}$/.test(str)) {
if (str.substr(str.length - 1, 1) == '.') {
return false;
}
return true;
}
else {
return false;
}
}
//获取字符串的大小，返回字节的大小
function GetStringLength(text) {
var codingText = text.replace(/[^\x00-\xff]/g, "**");
return codingText.length;
}