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 {
  		
		
		var selectedText = document.selection.createRange().text;
        
        if (selectedText != "") {
            var newText = tagstart + selectedText + tagend;
            document.selection.createRange().text = newText;
        } 
  	
	
	}
  }