// Scramble function, takes parameter of number of logos to display,
// retrieves them from the database, mixes them up and returns
// the table
function scrambleLogos (numberOfCells,logoRows,logoCols) {
var numberOfCells, numberOfRows, noCols, nIndex, nRnd, arrCount,bFound, iRow, iCol,tmpCells, arr;
//swap cells around
numberOfRows = logoRows;
noCols = logoCols;
// select logos from table
//build up array of all cell values
dataArray = new Array();
cellN=0;
19
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
dataArray[cellN] = "
";
cellN++;
//build up random number array based on number of logos
nIndex=0;
if (cellN <= 1) {
arr = new Array(cellN);
} else {
arr =new Array(cellN-1);
}
for (nIndex=0; nIndex < cellN; nIndex++) {
bFound=1;
while (bFound == 1) {
bFound=0;
if (cellN <= 1) {
nRnd=0;
} else {
nRnd=getRandomNum(cellN-1);
}
//check number not already in array
for (arrCount=nIndex; arrCount >= 0; arrCount-- ) {
if (arr[arrCount]==nRnd) {
bFound=1;
}
}
}
arr[nIndex] = nRnd;
}
//assign values to new array in random fashion
if (cellN <= 1) {
tmpCells=new Array(cellN);
} else {
tmpCells= new Array(cellN-1);
}
nIndex=0;
for (x=0;x < cellN; x++) {
tmpCells[x] = dataArray[arr[nIndex]];
nIndex++;
}
//assign values to table cells
x=0;
for (iRow=0;iRow < numberOfRows; iRow++) {
oRow=logoTable.insertRow();
for (iCol=0; iCol < noCols; iCol++) {
oRow.insertCell();
if (x < cellN ) {
oRow.cells[iCol].innerHTML = tmpCells[x];
//logoBody.rows[iRow].cells[iCol].innerHTML = tmpCells[x];
x++;
} else {
break;
}
}
}
}
// Random number generator , used to randomly fill an array with logos
function getRandomNum(maxValue) {
//Create new instance of date
var now=new Date();
//Create a random number
var randNum = now.getTime() * now.getSeconds() * Math.random();
//Cut random number to an integer to an integer value between 0 and maxValue
return Math.round(randNum % maxValue);
}