coordinate system

[salah jubeh]

Hi all,
   
  i have mapserver javascript library , i see this code 
   
  function Mapserv_applybox(minx, miny, maxx, maxy) 
  {
  var temp = new Array(4);
  temp[0] = this.extent[0] + this.cellsize*minx;
  temp[1] = this.extent[3] - this.cellsize*maxy;
  temp[2] = this.extent[0] + this.cellsize*maxx; 
  temp[3] = this.extent[3] - this.cellsize*miny;
  this.extent = temp; .........................
   
  i find it strange a little bit, i have non projected image and the extent of this image 0,0,370,450 when i display it with mapserver it gave me the lower Right coordinate for the image 370,0 while the upper left 0,450. i cannot understand this behavior. why i did not get the upper left 00 and the lower right 370,450.
   
  i will be glade if some one explain to me.
   
   

		
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