JavaScript

+ z +" "

I tried the following lines at least.. have you got an idea about this statement?

document.write("<BR><BR>" + "Combination is  :" + "<BR>");
do(q) { z += 1;
    var q = Math.round(Math.random()* 11);
            if(q==q) {return q;}
    document.write(rec[q] +", "+ z);
} while(z==6);

<script>
    // create and initialise - array to keep track of any number taken
    var taken = new Array(49);
    for (var i=49; i>0; i--) taken[i]=false;

    var lucky = [];
    var rec = ["19","20","21","40","41","45","12","23","34","36","37","46"];
    document.write("Weekly records for 2 week : ");
    for(var i=0; i<12; i++) {
        document.write(rec[i] + ",");
    }

    document.write("<br><hr>");

    var z=0;
    do {
        var q = Math.round(11 * Math.random());
        if(!taken[ rec[q] ]) {
            lucky[z] = rec[q];
            taken[ rec[q] ] = true;
            document.write(lucky[z] + "<br>");
            z++;       
        }
    } while (z < 6);
</script>

if(!taken[ rec[q] ]) 

do(q)

do {

z +=1; // z (undefined) +1 is still undefined

if(q==q) return q;

return q; // if (q==q) {return q;} 

var arrNumbers = [49];
var arrOutside = [];
var arrInside  = ["19","20","21","40","41","45","12","23","34","36","37","46"];
var z=0;
for(var i=0; i<12; i++) { arrInside[i]=false; }  

for(var j=49; j>0; --j) 
{ 
   arrNumbers[j]=j; 

   if(arrNumbers[j] != arrInside[i]) {
      document.write(arrNumbers[j]=arrOutside[z], +  ", ");
      arrInside[i] = true;
      z++;
   }
}

arrOutside[j]=j

arrNumbers[j] = arrOutside[z] 

arrNumbers[j] && arrInside[i] = true;

$(#container2).empty();
var htmlMarkup = $(#container1).html();
$(#container2).html(htmlMarkup);

[edit]
it might be on the last line
$(#container2).append(htmlMarkup);

$( "#sortable1, #sortable2" ).sortable({
     connectWith: ".connectedSortable";
}).disableSelection();