How to find Max value and index of max value

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Javascript

Java

Hi,
I have an array of integers
I like to retrieve the max number and index of max number from that array without using Math.Max() function..
what is the easiest way...

Cheers
Santhosh ;P ;P

function insRows()
{
    var x = document.getElementById('finalMarks').insertRow();
    var cell = x.insertCell(0)
    var a = x.insertCell(1);
    var b = x.insertCell(2);
    var c = x.insertCell(3);
    var d = x.insertCell(4);
    var element1 = document.createElement("input");
        element1.type = "checkbox";
        cell.appendChild(element1);
    a.innerHTML = document.getElementById('txtqualify').options[document.getElementById('txtqualify').selectedIndex].text
    b.innerHTML = document.getElementById('txtsem').value
    c.innerHTML = document.getElementById('txtmaxmrk').value
    d.innerHTML = document.getElementById('txtobtmrk').value
}

function function1()
{
   var myRow = document.all.finalMarks.rows.length;
   var ed='';
   var mm=0,om=0, x,z;
   for(i=0;i<myRow;i++)
   {
        r = document.all.finalMarks.rows[i];
    pr = r.cells[1].innerHTML
    mm+= parseInt(r.cells[3].innerHTML)
    om+= parseInt(r.cells[4].innerHTML)
    if (pr!=ed && ed!='')//(i==myRow-1)
        {
            prevr = document.all.finalMarks.rows[i-1];
            mycurrent_cell = document.createElement("td");
            mm-= parseInt(r.cells[3].innerHTML)
            om-= parseInt(r.cells[4].innerHTML)
            z = (om/mm)*100
            mycurrent_cell.innerHTML = z
            mm= parseInt(r.cells[3].innerHTML)
            om= parseInt(r.cells[4].innerHTML)
            alert(mycurrent_cell.innerHTML  +   '['  + pr + ']' + ed)
            //alert(!isNaN(mycurrent_cell.innerHTML))
            if(!isNaN(mycurrent_cell.innerHTML))
            {
                qualary[qualary.length] = prevr.cells[1].innerHTML
                pctary[pctary.length] = mycurrent_cell.innerHTML
                prevr.appendChild(mycurrent_cell);
                mycurrent_cell.innerHTML = z;
                document.getElementById('txtpert').value = z
             }
        }
        ed = r.cells[1].innerHTML
        alert(ed)
        if (i==myRow-1)
    {
            prevr = document.all.finalMarks.rows[i];
            //mycurrent_cell = document.createElement("td");
            x = (om/mm)*100
            mycurrent_cell.innerHTML = x
            qualary[qualary.length] = prevr.cells[1].innerHTML
            pctary[pctary.length] = mycurrent_cell.innerHTML
            prevr.appendChild(mycurrent_cell);
            if(!isNaN(x))
            document.getElementById('txtperct').value = x
        }
    }
    //document.frmMarks.txtper.value = Math.max( x, z)
    var str = sortAndReturn(pctary,qualary)
    //alert(pctary  +   '$'   + qualary)    //alert(sortAndReturn(pctary,qualary))
    //alert(str)    //alert(str[0]+','+str[1])
     document.getElementById('degr').value = str.split('$')[0]
     document.getElementById('txtmarks').value = str.split('$')[1]
}
function sortAndReturn(pctary,qualary)
{
    var myArray3 = new Array();
    for(i=0;i<pctary.length;i++)
    myArray3[i]=pctary[i];
    sort(pctary)
    //alert(sort(pctary))    //alert(myArray3)
    return qualary[indexSearch(myArray3,pctary[0])] + '$' + pctary[0]
}
function sort(a)
{
    var  max;
    for(i=0;i<a.length;i++)
    {
        max   =  i;
        for(j=i+1;j<a.length;j++)
    {
            if (a[j]>a[max])
            {
        max=j;
            }
    }
    //alert(a[max])
        if (i != max)
        {
            var swap = a[i];
            a[i] = a[max];
            a[max] = swap;
        }
    }

}
function indexSearch(a,b)
{
    for(i=0;i<a.length;i++)
    if(a[i]==b)
    {return i ;}
}

HTML CODE:

<table BORDER ="6"  width="85%"align="center" bgcolor="#00FFFF"  style="font-family: Verdana;color: black;font-size: 12px">
                <tr>
                    <td align="center" width="25%" height="40"> Qualification:</td>
                    <td align="left" style="WIDTH:25%" >
                    <select id ="txtqualify" style ="width:150px;height:25px" name ="txtqualify"  > </select> </td>
                    <td align="center" width="25%" height="40">Semester:</td>
                    <td> <input type = "text" SIZE="8" maxlength = "3" id = "txtsem" name = "txtsem"> </td>
                </tr>
                <tr>
                    <td align= "center" width ="25%" height="40">Max.Marks:</td>
                    <td> <input type = "text" SIZE="8" maxlength = "3" id = "txtmaxmrk" name = "txtmaxmrk"> </td>
                    <td align= "center" width ="25%" height="40">Obtained.Marks:</td>
                    <td> <input type = "text" SIZE="8" maxlength = "3" id = "txtobtmrk" name = "txtobtmrk"> </td>
                </tr>
                <tr>
                    <td align= "center" width ="25%" height="40">Percentage:</td>
                    <td> <input type = "text" SIZE="8" maxlength = "5" id = "txtper" readonly name = "txtper">
                    <td align="center" colspan="4" valign="middle">
                        <input type="RESET" align="middle" style="width:20%" value="ADD"  onclick="insRows()" >
                         <input type="button" align="middle" style="width:20%" value="REMOVE" onclick="delRow()" >
                         <input type="button" align="middle" style="width:20%" value="CLOSE" onclick="" >
                         <input type="button" align="middle" style="width:20%" value="SUM" onclick="function1()" >
                    </td>
                    </tr>
                <tr>
                    <td  align="center" height="40"> <input type = "text" SIZE="8" maxlength = "5" id = "txtpert" name = "txtpert"> </td>
                    <td align="center"> <input type = "text" SIZE="8" maxlength = "5" id = "txtperct" name = "txtperct"> </td>
                    <td align="center"> <input type = "text" SIZE="10" maxlength = "5" readonly id = "degr" name = "degr"> </td>
                </tr>
            </table>
            <table id ="finalMarks" BORDER ="6" width="85%"align="center" bgcolor="#00FFFF"  style="font-family: Verdana;color: black;font-size: 12px">
                <thead>
                    <th height="40">Remove</th>
                    <th>Qualification</th>
                    <th>Sem/Year</th>
                    <th>Max.Marks</th>
                    <th>Obt.Marks</th>
                    <th>Percentage of Marks:</th>
                </thead>
            </table>

===============

From JSOP: This looks like homework. How can I tell? Because you're requirements are absurd. Nobody in their right mind would purposely avoid using features of the chosen language/framework unless there was a widely known and un-patched problem with said feature. Since there's nothing wrong with the built in Math.Max method, this is homework.

Next, you don't need to post the HTML code (and probably 90% of the C# code you posted) to ask this question. It's title "Quick Answers" for a reason.

Lastly, THINK about the problem, and try to come up with as many ways to address the issue as you can, and then pick the one YOU think is the best. Your instructor will be happy to ridicule your choice.