Javascript: Getting Current Window Dimension

Javascript function to get current window height and width. Works with most of the browsers.

// function to get the current width of the window
function getWidth(){
 var x = 0;
 if (self.innerHeight){
     x = self.innerWidth;
 }else if (document.documentElement && document.documentElement.clientHeight){
     x = document.documentElement.clientWidth;
 }else if (document.body){
     x = document.body.clientWidth;
 }
 return x;
}

// function to get the current height of the window
function getHeight(){
 var y = 0;
 if (self.innerHeight){
     y = self.innerHeight;
 }else if (document.documentElement && document.documentElement.clientHeight){
     y = document.documentElement.clientHeight;
 }else if (document.body){
     y = document.body.clientHeight;
 }
 return y;
}