function stripHtmlMy(s) {
    return s.replace(/( )*/g,"");
}

function save_tree(id)
{
    var result = "";

    // take table
    this.table = document.getElementById(id);

    // find header content
    var tableBody = table.getElementsByTagName('thead');
    var tableRows = tableBody[0].getElementsByTagName('tr');

    var q = -1;
    for(var i=0;i<tableRows.length;i++)
    {
	// get cells of given row
	var tableRowTDArray = tableRows[i].getElementsByTagName('th');
	for(var j=0;j<tableRowTDArray.length;j++)
	{
	    if(tableRowTDArray[j].id!='action')
	    {
		// find 'span' element in the cell and retrieve it content
		var rowSpans = tableRowTDArray[j].getElementsByTagName('span');
		if(rowSpans.length>0)
		    result += rowSpans[0].innerHTML + "|";
	    }
	    else
		q=j;
	}

	result += "+++++";

    }

    // find rows in the table
    var tableBody = table.getElementsByTagName('tbody');
    var tableRows = tableBody[0].getElementsByTagName('tr');

    for(var i=0;i<tableRows.length;i++)
    {
	// get cells of given row
	var tableRowTDArray = tableRows[i].getElementsByTagName('td');
	for(var j=0;j<tableRowTDArray.length;j++)
	{
	    if(j==q)continue;
	    // find 'span' element in the cell and retrieve it content
	    var rowSpans = tableRowTDArray[j].getElementsByTagName('span');
	    if(rowSpans.length>0)
	    {
		result += stripHtmlMy(rowSpans[0].innerHTML) + "|";
	    }
	    else
	    {
		// try to get 'img' and their 'src'
		var rowImg = tableRowTDArray[j].getElementsByTagName('img');
		if(rowImg.length>0)
		{
		    for(var k=0;k<rowImg.length;k++)
			result += "<div><img src=" + rowImg[k].src + " height='" + rowImg[k].height + "' width='" + rowImg[k].width + "'/></div>";
		    result += "|";
		}
	    }
	}

	result += "+++++";

    }

    // set 'result' as content of hidden field in the form
    document.sendForm.table_content.value = result;
}