function insertBBCode(elementID, bbCode) 
{ 
    if (typeof elementID === 'undefined' || typeof bbCode === 'undefined') return; 
    if (document.getElementById(elementID)) { 
        var elementObject = document.getElementById(elementID); 
        if (document.selection) { // IE 
            elementObject.focus(); 
            var sel = document.selection.createRange(); 
            sel.text = bbCode; 
        } else if (elementObject.selectionStart || elementObject.selectionStart == '0') { 
            var startPos = elementObject.selectionStart; 
            var endPos = elementObject.selectionEnd; 
            elementObject.value = elementObject.value.substring(0, startPos) + bbCode + elementObject.value.substring(endPos, elementObject.value.length); 
        } else { 
            elementObject.value += bbCode; 
        } 
        elementObject.focus(); 
    } 
}