//获取input/textarea中选择的文本
function getSelectedText(textbox){
if (document.selection){//IE
return document.selection.createRange().text;
}
else {
return textbox.value.substring(textbox.selectionStart,
textbox.selectionEnd);
}
}
//设置input/textarea中选中的文本
function selectText(textbox, startIndex, stopIndex){
if (textbox.setSelectionRange){
textbox.setSelectionRange(startIndex, stopIndex);
}
else if (textbox.createTextRange){//IE
var range = textbox.createTextRange();
range.collapse(true);
range.moveStart('character', startIndex);
range.moveEnd('character', stopIndex - startIndex);
range.select();
}
textbox.focus();
}