jquery 기반 업로드 이미지 및 이미지 크기 검증,이미지 미리 보기 효과 코드

 
*/ 
function submit_upload_picture(){ 
var file = $('file_c').value; 
if(!/.(gif|jpg|jpeg|png|gif|jpg|png)$/.test(file)){ 
alert("       .gif,jpeg,jpg,png    ") 
}else{ 
$('both_form').action="file!upload.action"; 
$('both_form').submit(); 
$('insert_img').sethtml('<img src="http://images.anjiwu.com/images/loading.gif"/>'); 
$('display_div').setstyle('display', 'block'); 
$('upload_div').setstyle('display', 'none'); 
} 
} 

 
//    
function validate_edit_logo(a){ 
var file = $('file').value; 
if(!/.(gif|jpg|jpeg|png|gif|jpg|png)$/.test(file)){ 
alert("       .gif,jpeg,jpg,png    ") 
if(a==1){ 
return false; 
} 
}else{ 
var image = new image(); 
image.src = file; 
var height = image.height; 
var width = image.width; 
var filesize = image.filesize; 
$('beforeend').src=file; 
$('div_regi_right').setstyle('display', 'block'); 
if(width>80 && height>80 && filesize>102400){ 
alert('   80*80         100k   '); 
if(a==1){ 
return false; 
} 
} 
if(a==1){ 
return true; 
} 
} 
} 

 
//    
function viewimg(index) { 
var name = 'uploadimg' + index; 
var imgup = $(name); 
var imgpath = getpath(imgup); 
var local = imgup.value; 
var point = local.lastindexof("."); 
//         
var img = document.createelement("img"); 
img.src = local; 
var filesize = img.filesize; 
img.onload = function(){filesize=this.filesize;} 
if(img.filesize>5242880){ 
alert("      ！"); 
return false; 
} 
//          
var imgname = imgup.value.substring(imgup.value.lastindexof("."), imgup.value.length); 
imgname = imgname.tolowercase(); 
if ((imgname != ".jpg") && (imgname != ".gif") && (imgname != ".jpeg") && (imgname != ".png") && (imgname != ".bmp")) { 
alert("u8bf7u9009u62e9u56feu7247u6587u4ef6uff0cu8c22u8c22!"); 
imgup.focus(); 
//  file    www.3ppt.com 
imgup.select(); 
document.selection.clear(); 
} else { 
//     
document.getelementbyid("sig_preview"+index).innerhtml = "<img src='" + imgpath + "' border=0 width=200 height=150><img src='images/u51.png' width='16' height='14' onclick='delimage(" + index + ");' />"; 
} 
if (index >=3){ 
var cnt = index + 1; 
$("img" + cnt).style.display = ""; 
} 
}