getPageNumRange

<script>

function  getPageNumRange(pagenumstr)
{
        var pages=pagenumstr.split(";");
        pages.sort(function(a,b){
         return a-b;
        });
        var delta=0;
        var lianxiu=new Array();
        var bulianxiu=new Array();
        for(var i=0;i<pages.length;i++){
            delta=0;
            delta=(1*pages[i+1])-(1*pages[i]);
            if(1==delta)
            {  //连续
               lianxiu.push(pages[i]);
               lianxiu.push(pages[i+1]);
            }
            else
             {
                if(delta>1)
                { //不连续
                  lianxiu.push("|");
                  if(lianxiu.indexOf(pages[i])==-1)
                  bulianxiu.push(pages[i]);
                }
             }

             if (i==pages.length-1){
                 if(lianxiu.indexOf(pages[i])==-1)
                 {
                     bulianxiu.push(pages[i]);
                 }
             } 
        }

        lianxiuStr=lianxiu.toString().replace(/\|\,/g,"|").replace(/\,\|/g,"|");
        var lianxiuArr=lianxiuStr.split("|");
        var ResultStr1="";
        for(var i=0;i<lianxiuArr.length;i++){
          var yema=lianxiuArr[i];
          if(""!=yema)
          {
            var yemaArr=yema.split(",");
            
            if(""==ResultStr1)
            {
              ResultStr1=yemaArr[0]+"-"+yemaArr[yemaArr.length-1];
            }
            else
              {
                ResultStr1=ResultStr1+";"+yemaArr[0]+"-"+yemaArr[yemaArr.length-1];
              }  
          }
        }//for 

        var resultPageNums="";
        var resultList=ResultStr1.split(";");

        for(var i=0;i<bulianxiu.length;i++){
           resultList.push(bulianxiu[i]);
        }

        resultList.sort(function(a,b){
        var v1,v2;
           if(a.indexOf("-")!=-1)
           {
          v1=a.substr(0,a.indexOf("-"))*1;
          }else  v1=a*1;
          
           if(b.indexOf("-")!=-1)
           {
            v2=b.substr(0,b.indexOf("-"))*1;
            }else  v2=b*1;
         return v1-v2;
        });
        return  resultList.toString();
}

alert(getPageNumRange("9;10;17;18;19;21;23;25;26;27;28;30;36;37;38;40"));

</script>