Created
March 9, 2015 10:12
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修正png在ie6底下顯示不正常 (需 x.gif檔)
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var pngfix = function (option) { | |
if (true || navigator.platform == "Win32" && navigator.appName == "Microsoft Internet Explorer" && window.attachEvent) { | |
if (!document.getElementsByClassName) { | |
document.getElementsByClassName = function (classname) { | |
var all = document.documentElement.all || document.all; | |
var elem, list, ret = []; | |
for (var i = 0; i < all.length; i++) { | |
elem = all[i]; | |
if (elem.className != "") { | |
list = elem.className.split(' '); | |
for (var j = 0; j < list.length; j++) { | |
if (list[j] == classname) { | |
ret.push(elem); | |
break; | |
} | |
} | |
} | |
} | |
return ret; | |
} | |
} | |
var target = (!!option && option.target) || []; | |
var exception = (!!option && option.exception) || []; | |
var checkskip = function (obj, arr) { | |
var skip = false; | |
var arr_class = [], arr_id = [], arr_tag = []; | |
for (var i = 0; i < arr.length; i++) { | |
var ex = arr[i]; | |
if (ex.substr(0, 1) == "#") { | |
arr_id.push(ex.substr(1)); | |
} else if (ex.substr(0, 1) == ".") { | |
arr_class.push(ex.substr(1)); | |
} else { | |
arr_tag.push(ex); | |
} | |
}; | |
if (obj.className != "") { | |
var classList = obj.className.split(' '); | |
for (var j = 0; j < classList.length; j++) { | |
for (k = 0; k < arr_class.length; k++) { | |
if (arr_class[k] == classList[j]) { | |
skip = true; | |
break; | |
} | |
} | |
if (skip) break; | |
} | |
} | |
if (obj.id != "") { | |
for (var k = 0; k < arr_id.length; k++) { | |
if (arr_id[k] == obj.id) { | |
skip = true; | |
break; | |
} | |
} | |
} | |
if (arr_tag.length) { | |
for (var k = 0; k < arr_tag.length; k++) { | |
if (arr_tag[k] == obj.tagName) { | |
skip = true; | |
break; | |
} | |
} | |
} | |
return skip; | |
}; | |
var rslt = navigator.appVersion.match(/MSIE (\d+\.\d+)/, ''); | |
if (true || rslt != null && Number(rslt[1]) >= 5.5 && Number(rslt[1]) <= 6) { | |
var all = document.documentElement.all || document.all; | |
var reg = /\s*(?:url\(\")?((([^:\/#@\?]+)?(?:\:\/\/)?[^\/#\?]*)?(([^#\?]*)?\/([^\.\/#\?]*))?(\.[^\.\/#\?\)\"]*)?)/; | |
for (var i = 0; i < all.length; i++) { | |
var obj = all[i], | |
bg = obj.currentStyle["background-image"], | |
offset, exec; | |
if (target.length != 0 && !checkskip(obj, target)) { | |
continue; | |
} | |
if (checkskip(obj, exception)) { | |
continue; | |
}; | |
if (obj.src) { | |
exec = reg.exec(obj.src); | |
if (exec[7] == ".png") { | |
obj.src = "images/x.gif"; | |
obj.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + exec[1] + "', sizingMethod='crop')"; | |
obj.style["background-position"] = offset || ""; | |
obj.style.width = obj.width + "px"; | |
obj.style.height = obj.height + "px"; | |
} | |
} | |
if (bg != "none") { | |
exec = reg.exec(bg); | |
if (exec[7].toLowerCase() == ".png") { | |
offset = obj.style["background-position"]; | |
if (obj.currentStyle.backgroundRepeat != "repeat-x") { | |
obj.style.backgroundImage = "url('images/x.gif')"; | |
obj.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + exec[1] + "', sizingMethod='crop')"; | |
obj.style["background-position"] = offset || ""; | |
} | |
} | |
} | |
} | |
} | |
} | |
}; |
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