consta de 3 archivos :
prueba.html :
Código HTML:
<html> <head> <script src="multifile_compressed.js"></script> </head> <body> <form enctype="multipart/form-data" action="your_script_here.script" method = "post"> <input id="my_file_element" type="file" name="file_1" > <input type="submit"> </form> Imagenes: <div id="files_list"></div> <script> var multi_selector = new MultiSelector( document.getElementById( 'files_list' ), 10 ); multi_selector.addElement( document.getElementById( 'my_file_element' ) ); </script> </body> </html>
multifile_compressed.js :
Código HTML:
function MultiSelector( list_target, max ){this.list_target = list_target;this.count = 0;
this.id = 0;if( max ){this.max = max;} else {this.max = -1;};this.addElement = function( element ){if( element.tagName == 'INPUT' && element.type == 'file' ){element.name = 'file_' + this.id++;element.multi_selector = this;element.onchange = function(){var new_element = document.createElement( 'input' );new_element.type = 'file';this.parentNode.insertBefore( new_element, this );this.multi_selector.addElement( new_element );this.multi_selector.addListRow( this );this.style.position = 'absolute';this.style.left = '-1000px';};if( this.max != -1 && this.count >= this.max ){element.disabled = true;};this.count++;this.current_element = element;} else {alert( 'Error: not a file input element' );};};this.addListRow = function( element ){var new_row = document.createElement( 'div' );var new_row_button = document.createElement( 'input' );new_row_button.type = 'button';new_row_button.value = 'Delete';new_row.element = element;new_row_button.onclick= function(){this.parentNode.element.parentNode.removeChild( this.parentNode.element );this.parentNode.parentNode.removeChild( this.parentNode );this.parentNode.element.multi_selector.count--;this.parentNode.element.multi_selector.current_element.disabled = false;return false;};new_row.innerHTML = element.value;new_row.appendChild( new_row_button );this.list_target.appendChild( new_row );};};
y por ultimo multifile.js
Código HTML:
function MultiSelector( list_target, max ){
// Where to write the list
this.list_target = list_target;
// How many elements?
this.count = 0;
// How many elements?
this.id = 0;
// Is there a maximum?
if( max ){
this.max = max;
} else {
this.max = -1;
};
/**
* Add a new file input element
*/
this.addElement = function( element ){
// Make sure it's a file input element
if( element.tagName == 'INPUT' && element.type == 'file' ){
// Element name -- what number am I?
element.name = 'file_' + this.id++;
// Add reference to this object
element.multi_selector = this;
// What to do when a file is selected
element.onchange = function(){
// New file input
var new_element = document.createElement( 'input' );
new_element.type = 'file';
// Add new element
this.parentNode.insertBefore( new_element, this );
// Apply 'update' to element
this.multi_selector.addElement( new_element );
// Update list
this.multi_selector.addListRow( this );
// Hide this: we can't use display:none because Safari doesn't like it
this.style.position = 'absolute';
this.style.left = '-1000px';
};
// If we've reached maximum number, disable input element
if( this.max != -1 && this.count >= this.max ){
element.disabled = true;
};
// File element counter
this.count++;
// Most recent element
this.current_element = element;
} else {
// This can only be applied to file input elements!
alert( 'Error: not a file input element' );
};
};
/**
* Add a new row to the list of files
*/
this.addListRow = function( element ){
// Row div
var new_row = document.createElement( 'div' );
// Delete button
var new_row_button = document.createElement( 'input' );
new_row_button.type = 'button';
new_row_button.value = 'Delete';
// References
new_row.element = element;
// Delete function
new_row_button.onclick= function(){
// Remove element from form
this.parentNode.element.parentNode.removeChild( this.parentNode.element );
// Remove this row from the list
this.parentNode.parentNode.removeChild( this.parentNode );
// Decrement counter
this.parentNode.element.multi_selector.count--;
// Re-enable input element (if it's disabled)
this.parentNode.element.multi_selector.current_element.disabled = false;
// Appease Safari
// without it Safari wants to reload the browser window
// which nixes your already queued uploads
return false;
};
// Set row value
new_row.innerHTML = element.value;
// Add button
new_row.appendChild( new_row_button );
// Add it to the list
this.list_target.appendChild( new_row );
};
};
1. _Como hago para validar el tipo de archivo.. en
2. como tomo las variables con POST ?? como un arreglo ??
3. de ser imágenes cuando se carga el archivo en ves del nombre del archivo se podra mostrar un previu de la imagen ??
gracias
