var win=null;

function clearField(field,value) {
        if (value) {
                field.defaultValue = value;
                if (field.value == value) {
                        field.value = '';
                }
        } else if (field.value != ""){
                field.defaultValue = field.value;
                field.value = '';
        }
}

function openWindow(windowName, url, option) {
  var winWidth = 753;
  var winHeight = 471;
  var xPos = (screen.availWidth-winWidth)/2;
  var yPos = (screen.availHeight-winHeight)/2;

  //For external site pop ups
  if (option==1) {options = "directories=yes,status=yes,menubar=yes,personalbar=yes,titlebar=yes,toolbar=yes,location=yes,top=" + yPos + ",left=" + xPos + ",width=" + winWidth + ",height=" + winHeight +",resizable=yes,scrollbars=yes";}
  //For Video pop ups
  if (option==2) {options = "top=" + yPos + ",left=" + xPos + ",width=650" + ",height=395"  +",resizable=no";}
  //For pop up files (jpg, pdf)
  if (option==3) {options = "menubar=no,personalbar=no,titlebar=no,toolbar=no,location=no,top=" + yPos + ",left=" + xPos + ",width=" + winWidth + ",height=" + winHeight +",resizable=yes,scrollbars=yes";}

  if (option==4) {options = "menubar=no,personalbar=no,titlebar=no,toolbar=no,location=no,top=" + yPos + ",left=" + xPos + ",width=472,height=675,resizable=yes,scrollbars=no";}
  //For Flash pop ups
  if (option==5) {options = "top=" + yPos + ",left=" + xPos + ",width=930" + ",height=580"  +",resizable=no";}
   // For definitions
  if (option==6) {options = "top=" + yPos + ",left=" + xPos + ",width=350" + ",height=190"  +",resizable=no,scrollbars=yes";}
  if (option==7) {options = "top=" + yPos + ",left=" + xPos + ",width=415" + ",height=380"  +",resizable=no,scrollbars=yes";}
  // For dealer map
  if (option==8) {options = "top=" + yPos + ",left=" + xPos + ",width=750" + ",height=490"  +",resizable=yes,scrollbars=yes,toolbar=no,menubar=yes";}

  win=window.open(url, windowName, options);
}