function formatText(el,tagstart,tagend) {
  	if (el.setSelectionRange) {
 		el.value = el.value.substring(0,el.selectionStart) + tagstart + el.value.substring(el.selectionStart,el.selectionEnd) + tagend + el.value.substring(el.selectionEnd,el.value.length)
  	}
  	else {
  		// IE code here...
  	}
  }