alert out the random value code in the array_javascript skills

Js code

/* 
* 随即alert出数组的值 
* a表示数组 
*/ 
function alert1(a) 
{ 
var alength = a.length; 
if (alength > 1) 
{ 
var r = random1(0,alength); 
alert(a[r]); 
a[r] = -1; 
var temp = Array(alength-1); 
var t = false; 
for(var i = 0; i<a.length; i++) 
{ 
if ( i == r){ 
t = true; 
} 
else{ 
if (t == false){ 
temp[i] = a[i]; 
}else{ 
temp[i-1] = a[i]; 
} 
} 

} 
alert1(temp); 
} 
else 
{ 
alert(a[0]); 
} 
}

Js code

/* 
* 
* 随即的到min（包含）和max（不包含）之间的值 
*/ 
function random1(min, max){ 
return Math.floor(min + ((Math.random() * 10) % (max - min))); 
}