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js 屏蔽form的onkeydown onkeyup onkeypress 的13按键

 
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js 屏蔽form的onkeydown onkeyup onkeypress 的13按键后

textarea组件回车失效问题处理。。

 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>首页</title>
<script language="javascript">
function insertData(obj,str){
 if (document.selection) {
        var sel = document.selection.createRange();
        sel.text = str;
    } else if (typeof obj.selectionStart === 'number' && typeof obj.selectionEnd === 'number') {
        var startPos = obj.selectionStart,
            endPos = obj.selectionEnd,
            cursorPos = startPos,
            tmpStr = obj.value;
        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('character',len);
        sel.collapse();
        sel.select();
    } else if (typeof obj.selectionStart == 'number' && typeof obj.selectionEnd == 'number') {
        obj.selectionStart = obj.selectionEnd = len;
    }
}

</script>
</head>

<body>
开发当中.........

<form onkeydown="if(event.keyCode ==13) return false;" onkeyup="if(event.keyCode ==13) return false;" onkeypress="if(event.keyCode ==13) return false;">
<textarea name="aaa" id="aaa" onsumbit="return true;"  onkeydown="if(event.keyCode ==13) {insertData(this,'\n');};"></textarea>
</form>
</body>
</html>

 

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