function getCanvas(){
        if (document.width) this.w = document.width;
   else if (document.documentElement && document.documentElement.clientWidth) this.w = document.documentElement.clientWidth;
   else if (document.body && document.body.clientWidth) this.w = document.body.clientWidth;
   else if (window.innerWidth) this.w = window.innerWidth;
   else this.w = 0;

   if (document.height) this.h = document.height;
   else if (document.documentElement && document.documentElement.clientHeight) this.h = document.documentElement.clientHeight;
   else if (document.body && document.body.clientHeight) this.h = document.body.clientHeight;
   else if (window.innerHeight) this.h = window.innerHeight;
        else this.h = 0;
}

var canvas = new getCanvas();

if (canvas.w > 790) {
  var frmleft = (Math.floor((canvas.w-790)/2))+10;
} else {
  var frmleft = 10;
}

if (canvas.w > 790) {
  var frmleft_ap = (Math.floor((canvas.w-790)/2))+330;
} else {
  var frmleft_ap = 330;
}

if (canvas.w > 790) {
  var frmleft_osa = (Math.floor((canvas.w-790)/2))+330;
} else {
  var frmleft_osa = 330;
}

if (canvas.w > 790) {
  var frmleft_top = (Math.floor((canvas.w-790)/2))+250;
} else {
  var frmleft_top = 250;
}

if (canvas.w > 900) {
  var frmleft_top_home = (Math.floor((canvas.w-900)/2))+190;
} else {
  var frmleft_top_home = 190;
}