javascript函数使用.setSelectionRange()在textarea中选择某个单词.在Firefox中,文本区域自动向下滚动以显示所选文本.在Chrome(v14)中,没有.有没有办法让Chrome滚动文本区域到新选择的文本？欢迎jQuery解决方案
解决方法
这是一个简单有效的解决方案,纯js：
//first of all,you ignore any bad english,as i'm french and had a funny evening
//get the textarea
var textArea = document.getElementById('myTextArea');
//define your selection
var selectionStart = 50;
var selectionEnd = 60;
textArea.setSelectionRange( selectionStart,selectionEnd);
// now lets do some math
// we need the number of chars in a row
var charsPerRow = textArea.cols;
// we need to know at which row our selection starts
var selectionRow = (selectionStart - (selectionStart % charsPerRow)) / charsPerRow;
// we need to scroll to this row but scrolls are in pixels,// so we need to know a row's height,in pixels
var lineHeight = textArea.clientHeight / textArea.rows;
// scroll !!
textArea.scrollTop = lineHeight * selectionRow;
把它放在一个函数中,用它扩展javascript的Element对象的原型,你很好.
随时问你是否需要进一步的帮助.
