JS Show or hide a layer function

/*
========================
Function: Show or hide layers
Showdiv (divid_array,showlocality_array)
parameter description:
Divid_ Array all the layer IDs to be manipulated, separated by commas
Showlocality_array the position of all the layers to be displayed in the parameter Dividarray. All is displayed for "0" or empty, and all is hidden if it is set to a negative number.
For example: Showdiv (' div3,div1,div2 ', ' 2,3 ') to display the second (DIV1) and third layer (DIV2), the first layer (DIV3) will be hidden.
========================
*/
Function Showdiv (divid_array,showlocality_array)
{
 var div_ Array = new Array ();
 var Locality_array = new Array ();
 var intlocality;//showlocality_array Array length
 var intdiv;//div_array array length
 var intTemp = 1;// Temporary variable
 var inttmp = 1;//temporary variable
 
 //initialization
 if (divid_array)
 {
   Div_array = Divid_array.split (",");
 }else{
  intdiv = 0;
&NBSP}
 if (showlocality_array)
 {
  locality_array = Showlocality_array.split (",") ;
  intlocality = locality_array.length;

for (var n = 0;n < intlocality;n++)
{
IntTemp *= Locality_array[n];

}
if (intTemp <= 0)
{
intlocality = intTemp;
}else{
intlocality = Div_array.length;

while (intlocality > 0)
{
Intlocality-= 1;
document.getElementById ("" + div_array[intlocality] + ""). Style.display = "None";
}
intlocality = 1;
}
}else{
intlocality = 0;
}

Show specified layer
if (intdiv!= 0 && intlocality >0)
{
Intdiv = Div_array.length;
intlocality = Locality_array.length;

Sort Locality_array Array
for (var n = 0;n < intlocality;n++)
{
IntTemp = Locality_array[n];

for (var m = n + 1;m < intlocality;m++)
{
if (Locality_array[n] > Locality_array[m])
{
Locality_array[n] = locality_array[m];
LOCALITY_ARRAY[M] = intTemp;
IntTemp = Locality_array[n];
}
}
}

intlocality = Locality_array.length;
intTemp = 0;

//
while (IntTemp < intlocality)
{
if ((Locality_array[inttemp]-1) < div_array.length)
{
Inttmp = locality_array[inttemp]-1;
document.getElementById ("" + div_array[inttmp] + ""). Style.display = "block";
}

IntTemp + 1;
}
}
else if (intlocality = 0)
{//Show all layers
intlocality = Div_array.length;

while (intlocality > 0)
{
Intlocality-= 1;
document.getElementById ("" + div_array[intlocality] + ""). Style.display = "block";
}
}else{//Hide All Layers
intlocality = Div_array.length;

while (intlocality > 0)
{
Intlocality-= 1;
document.getElementById ("" + div_array[intlocality] + ""). Style.display = "None";
}
}
}