// *******************************************************
// replacements for unsupported array functions (because arrayname.push(var)
// and arrayname.pop() are not implemented in IE until version 5.5)
function thearrayisgood(thearray,i) {
? ?? ?? ?if ((thearray[i] == "undefined") || (thearray[i] == "") || (thearray[i] == null))
? ?? ?? ?? ? return false;
? ?? ?? ?else
? ?? ?? ?? ? return true;
}

function getarraysize(thearray) {
// replacement for arrayname.length property
? ?? ???for (i = 0; i < thearray.length; i++) {
? ?? ?? ?? ?? ? if ((thearray[i] == "undefined") || (thearray[i] == "") || (thearray[i] == null))
? ?? ?? ?? ?? ?? ?? ?? ?return i;
? ?? ?? ?? ?? ? }
? ?? ???return thearray.length;
}

function arraypush(thearray,value) {
// replacement for arrayname.push(value)
? ?? ???thearraysize = getarraysize(thearray);
? ?? ???thearray[thearraysize] = value;
? ?? ???return thearray[thearraysize];
}

function arraypop(thearray) {
// replacement for arrayname.pop()
? ?? ???thearraysize = getarraysize(thearray);
? ?? ???retval = thearray[thearraysize - 1];
? ?? ???delete thearray[thearraysize - 1];

??????? thearray.length--; <<==我加了這句，很關(guān)鍵，否則出錯(cuò)
????????return retval;
}

// *******************************************************

另外給出網(wǎng)上幾個(gè)老外寫的

function Array_pop() {
? var response = this[this.length - 1]
? this.length--
? return response
? }

if (typeof(Array.prototype.pop) == "undefined") {
? Array.prototype.pop = Array_pop
? }

function Array_push() {
? var A_p = 0
? for (A_p = 0; A_p < arguments.length; A_p++) {
?? this[this.length] = arguments[A_p]
?? }
? return this.length
? }

if (typeof Array.prototype.push == "undefined") {
? Array.prototype.push = Array_push
? }

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