錯誤的變化形式行動

Question

我改變形式行動：

window.onload = function() { 
    document.getElementById('pdf').onclick = addExportEvent; 
    document.getElementById('xls').onclick = addExportEvent; 
    document.getElementById('xml').onclick = addExportEvent; 
    document.getElementById('csv').onclick = addExportEvent; 
} 

function addExportEvent() { 
    data = grid.getAllGridData(); 
    document.getElementById('dados').setAttribute('value', encodeURIComponent(JSON.stringify(data))); 

    formulario = document.getElementById('formulario'); // Line 55! 
    formulario.action = 'php/' + this.id + '.php'; 
    formulario.submit(); 

    return false; 
} 

不過，這並不與Internet Explorer工作。它返回以下錯誤：

Message: The object doesn't support the property or method. 
Line: 55 
Character: 2 
Code: 0 
URI: http://www.site.com/javascript/scripts.js 

Answer 1

我認爲安迪E的頭評論擊中了它，好，頭。你正在分配正確的元素，但沒有聲明它使用變種，這使IE插件和窒息和各種不好的東西。其他瀏覽器處理這一點很好。所以，你想，而不是訪問它聲明，這意味着它永遠不會id的值的formulario：formulario

function addExportEvent() { 
    var data = grid.getAllGridData(); 
    document.getElementById('dados').setAttribute('value', encodeURIComponent(JSON.stringify(data))); 

    var formulario = document.getElementById('formulario'); // Line 55! 
    formulario.action = 'php/' + this.id + '.php'; 
    formulario.submit(); 

    return false; 
}