input/textarea text of choice and access

获得input/textarea的选择文本

 

function getSelectedText(textbox){
    if(document.selection){//IE
       return document.selection.createRange().text;
    }else{
       return textbox.value.substring(textbox.selectionStart,textbox.selectionEnd);
     }
}

设置 选择input/textarea里的文本

 

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();
}