B/S开发中个人典藏js函数 汇总帖(不断更中)

//获取url参数如index.htm?id=1 用geturl('id') 返回1
function geturl(seekParameter)
{
 var url=location.href;
 var parameters=url.substr(url.indexOf("?")+1);
 var parameterItems=parameters.split("&");
 var parameterName;
 var parameterVar;
 for(i in parameterItems)
 {
  parameterName=parameterItems[i].split("=")[0];
  parameterVar=parameterItems[i].split("=")[1];
  if(parameterName==seekParameter)
  {
   return(parameterVar);
  }
 }
}

//弹出模拟警告框且背景不可操作 可传入html值 
   function sAlert(str){
            var msgw,msgh,bordercolor;
            msgw=400;//提示窗口的宽度
            msgh=100;//提示窗口的高度
            titleheight=25 //提示窗口标题高度
            bordercolor="#CD6F6F";//提示窗口的边框颜色
            titlecolor="#CD6F6F";//提示窗口的标题颜色
            
            var sWidth,sHeight;
            sWidth=document.body.offsetWidth;
            sHeight=screen.height;

            var bgObj=document.createElement("div");
            bgObj.setAttribute('id','bgDiv');
            bgObj.style.position="absolute";
            bgObj.style.top="0";
            bgObj.style.background="#777";
            bgObj.style.filter="progid:DXImageTransform.Microsoft.Alpha(style=1,opacity=50,finishOpacity=50";
            bgObj.style.opacity="0.6";
            bgObj.style.left="0";
            bgObj.style.width=sWidth + "px";
            bgObj.style.height=sHeight + "px";
            bgObj.style.zIndex = "10000";
            document.body.appendChild(bgObj);
            
            var msgObj=document.createElement("div")
            msgObj.setAttribute("id","msgDiv");
            msgObj.setAttribute("align","center");
            msgObj.style.background="white";
            msgObj.style.border="1px solid " + bordercolor;
            msgObj.style.position = "absolute";
            msgObj.style.left = "50%";
            msgObj.style.top = "30%";
            msgObj.style.font="12px/1.6em Verdana, Geneva, Arial, Helvetica, sans-serif";
            msgObj.style.marginLeft = "-225px" ;
            msgObj.style.marginTop = -75+document.documentElement.scrollTop+"px";
            msgObj.style.width = msgw + "px";
            msgObj.style.height =msgh + "px";
            msgObj.style.textAlign = "center";
            msgObj.style.lineHeight ="25px";
            msgObj.style.zIndex = "10001";
   
           var title=document.createElement("h4");
           title.setAttribute("id","msgTitle");
           title.setAttribute("align","right");
           title.style.margin="0";
           title.style.padding="3px";
           title.style.background=bordercolor;
           title.style.filter="progid:DXImageTransform.Microsoft.Alpha(startX=20, startY=20, finishX=100, finishY=100,style=1,opacity=75,finishOpacity=100);";
           title.style.opacity="0.75";
           title.style.border="1px solid " + bordercolor;
           title.style.height="18px";
           title.style.font="12px Verdana, Geneva, Arial, Helvetica, sans-serif";
           title.style.color="white";
           title.style.cursor="pointer";
           title.innerHTML="关闭";
           title.onclick=function(){
                document.body.removeChild(bgObj);
                document.getElementById("msgDiv").removeChild(title);
                document.body.removeChild(msgObj);
                }
           document.body.appendChild(msgObj);
           document.getElementById("msgDiv").appendChild(title);
           var txt=document.createElement("p");
           txt.style.margin="1em 0"
           txt.setAttribute("id","msgTxt");
           txt.innerHTML=str;
           document.getElementById("msgDiv").appendChild(txt);
            }

//js读写cookie

function SetCookie(name,value)//两个参数，一个是cookie的名子，一个是值
{
    var Days = 1; //此 cookie 将被保存 30 天
    var exp  = new Date();    //new Date("December 31, 9998");
    exp.setTime(exp.getTime() + Days*24*60*60*1000);
    document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
}
function getCookie(name)//取cookies函数        
{
    var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));
     if(arr != null) return unescape(arr[2]); return null;

}
function delCookie(name)//删除cookie
{
    var exp = new Date();
    exp.setTime(exp.getTime() - 1);
    var cval=getCookie(name);
    if(cval!=null) document.cookie= name + "="+cval+";expires="+exp.toGMTString();
}