javascript 关于this

javascript 关于this

function makeArray(n){
this.length=n //这个地方的this是指的什么?
return this
}
function hexfromdec(num) {
hex=new makeArray(1);
var hexstring=;
var shifthex=16;
var temp1=num;
for(x=1; x>=0; x--) {
hex[x]=Math.round(temp1/shifthex - .5);
hex[x-1]=temp1 - hex[x] * shifthex;
temp1=hex[x-1];
shifthex /= 16;
}
for (x=1; x>=0; x--) { hexstring+=getletter(hex[x]); }
return (hexstring);
}
function getletter(num) {
if (num < 10) { return num; }
else {
if (num == 10) { return A }
if (num == 11) { return B }
if (num == 12) { return C }
if (num == 13) { return D }
if (num == 14) { return E }
if (num == 15) { return F }
}
}
function rainbow(text){
var color_d1;
var allstring=;
for(i=0;i

好厉害呀