// is this browse a version of netscape prior to version 5?
    var NS4 = (navigator.appName == "Netscape" &&
    parseInt(navigator.appVersion) < 5);

function deleteColumn(columnno)
{
	var table= document.getElementById("snptable");
	//alert(table);
	//alert(columnno.name);

	var allRows = table.rows;
	var cells = allRows[0].cells;
	var cellNo = -1;
	for(var j = 0; j< cells.length; j++){
		if ( columnno.name == cells.item(j).id)
		cellNo = j;
	}
	//alert (cellNo);

	for (var i=0; i<allRows.length; i++) {
		if (allRows[i].cells.length > 1) {
			allRows[i].deleteCell(cellNo);
		}
	}



}
    // add an option with 'theText' and 'theValue' to selection list 'theSel'
    function addOption(theSel, theText, theValue)
    {
	var newOpt = new Option(theText, theValue);
	var selLength = theSel.length;
	theSel.options[selLength] = newOpt;
	theSel.options[selLength].selected=1;  //select this option
    }

    // delete the option at 'theIndex' from selection list 'theSel'
    function deleteOption(theSel, theIndex)
    {
	var selLength = theSel.length;
	if(selLength>0)
	{
		theSel.options[theIndex] = null;
	}
    }

    // move all selected options in 'theSelFrom' to selection list 'theSelTo'
    function moveOptions(theSelFrom, theSelTo)
    {
	var selLength = theSelFrom.length;
	var selectedText = new Array();
	var selectedValues = new Array();
	var selectedCount = 0;

	var i;

	// Find the selected Options in reverse order
	// and delete them from the 'from' Select.
	for(i=selLength-1; i>=0; i--)
	{
	    if(theSelFrom.options[i].selected)
	    {
		selectedText[selectedCount] = theSelFrom.options[i].text;
		selectedValues[selectedCount] = theSelFrom.options[i].value;
		deleteOption(theSelFrom, i);
		selectedCount++;
	    }
	}

	// Add the selected text/values in reverse order.
	// This will add the Options to the 'to' Select
	// in the same order as they were in the 'from' Select.
	for(i=selectedCount-1; i>=0; i--)
	{
		addOption(theSelTo, selectedText[i], selectedValues[i]);
		// select this option
		
	}
      //  form.selectedStrains.focus();
	if(NS4) history.go(0);
    }
  function getSelectedStrains(theSelBoxName){
      var selLength = theSelBoxName.length;
      var selectedCount = 0;
      var i;

	// Find the selected strains
	for(i=0; i<selLength; i--)
	{
	    if(theSelBoxName.options[i].selected)
	    {
		alert(" selected: "+theSelBoxName.options[i].text+" and "+theSelFrom.options[i].value+"--");
	    }
	}
  }
    // move the chosen reference strain (in selection list 'repList') back
    // to the list of strains at 'searchList'
    function unSetReference(searchList, repList)
    {
        if (repList.options.length > 0)
        {
	    repList.options[0].selected = 1;
	    moveOptions (repList, searchList);
        }
    }

    // move the selected strain in 'searchList' to selection list 'repList' to
    // become the reference strain for the query
    function setReference(searchList, repList)
    {
        ct = 0;
        selIndex = -1;

        for (i = 0; i < searchList.options.length; i++)
        {
          if (searchList.options[i].selected)
          {
              ct = ct + 1;
              selIndex = i;
          }
        }

        if (ct == 0)
        {
            alert ("Must select a strain in the 'Available Strains' box " +
	        "before you can make it the Reference Strain.");
        }
        else if (ct > 1)
        {
            alert ("Must only select one strain in the 'Available Strains' " +
	        "box before you can make it the Reference Strain.");
        }
        else
        {
	    // move any existing value from the 'Reference Strain' list back
	    // to the 'List of Strains' list:

	    if (repList.options.length > 0)
	    {
	        alert ("Your previous Reference Strain (" +
	            repList.options[0].text +
		    ") is being moved back to the 'Available Strains' box.");

	        repList.options[0].selected = 1;
	        moveOptions (repList, searchList);
	    }

	    // move the new value from the 'List of Strains' list to the
	    // 'Reference Strain' list:

	    moveOptions (searchList, repList);
        }
    }

    // move the selected strains in selection list 'selection' down one space
    // if 'down' is true, or up one space if 'down' is false
    function moveSelected (select, down)
    {
      if (select.selectedIndex != -1) {
        if (down) {
          if (select.selectedIndex != select.options.length - 1)
            var i = select.selectedIndex + 1;
          else
            return;
        }
        else {
          if (select.selectedIndex != 0)
            var i = select.selectedIndex - 1;
          else
            return;
        }
      var swapOption = new Object();
      swapOption.text = select.options[select.selectedIndex].text;
      swapOption.value = select.options[select.selectedIndex].value;
      swapOption.selected = select.options[select.selectedIndex].selected;
      swapOption.defaultSelected = select.options
      [select.selectedIndex].defaultSelected;
      var anIndex = select.selectedIndex;
      for (var property in swapOption){
          select.options[anIndex][property] = select.options[i][property];
      }
      for (var property in swapOption)
          select.options[i][property] = swapOption[property];
      }
      var elementcount=select.options.length;
      var j=0;
     // for(j=0;j<elementcount;++j)
       //  select.options[j].selected=1;  //select this option
    }
     //select all strains in the user selection list 
    function selectAll(select)
    {
      var elementcount=select.options.length;
      var j=0;
      for(j=0;j<elementcount;++j)
         select.options[j].selected=1;  //select this option
    }