Customize Sharepoint 2010 Editform.aspx

Add the following code through sharepoint designer Or CEW. Below peiece of code is hiding the columns in edit form......................

 _spBodyOnLoadFunctionNames.push("hideRows");
 function hideRows()
 {
  var pageTables = document.getElementsByTagName('table');
        var cName = null;
        var formTables = null;

        for(var i=0; i < pageTables.length; i++){
         cName = pageTables[i].className;
            if (cName == "ms-formtable"){
             formTables = pageTables[i];
            }
        }
            var rows = formTables.rows;
            rows[rows.length-2].style.display = "none";
            rows[rows.length-3].style.display = "none";
            rows[rows.length-1].style.display = "none";
            rows[rows.length-4].style.display = "none";   
            rows[rows.length-5].style.display = "none";
              
 }