JS在TextArea遊標位置插入文字並實現移動遊標到文字末尾_javascript技巧

obj.value = tmpStr.substring(0, startPos) str tmpStr.substring(endPos, tmpStr.length);
cursorPos = str.length;
obj.selectionStart=obj.selectionEnd=cursorPos;
} else {
obj.value = str;
}
}
function moveEnd(obj){
obj.focus();
var len = obj.value.length;
if (document.selection) {
var sel = obj.createTextRange();
sel.moveStart('字元',len);
sel.collapse();
sel.select();
} else if (typeof obj.selectionStart == 'number' && typeof obj.selectionEnd == 'number') {
obj.selectionStart = obj.selectionEnd = len;
}
}






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